Monday, October 3, 2016

Solu-Medrone 125 mg (Pharmacia Limited)





1. Name Of The Medicinal Product



Solu-Medrone 125 mg


2. Qualitative And Quantitative Composition



Solu-Medrone 125 mg : Methylprednisolone sodium succinate 165.8 mg equivalent to 125 mg of methylprednisolone.



3. Pharmaceutical Form



Powder for injection.



4. Clinical Particulars



4.1 Therapeutic Indications



Solu-Medrone is indicated to treat any condition in which rapid and intense corticosteroid effect is required such as:



1. Dermatological disease



Severe erythema multiforme (Stevens



2. Allergic states



Bronchial asthma



Severe seasonal and perennial allergic rhinitis



Angioneurotic oedema



Anaphylaxis



3. Gastro-intestinal diseases



Ulcerative colitis



Crohn's disease



4. Respiratory diseases



Aspiration of gastric contents



Fulminating or disseminated tuberculosis (with appropriate antituberculous chemotherapy)



5. Neurological disorders



Cerebral oedema secondary to cerebral tumour



Acute exacerbations of multiple sclerosis superimposed on a relapsing-remitting background.



6. Miscellaneous



T.B. meningitis (with appropriate antituberculous chemotherapy)



Transplantation



4.2 Posology And Method Of Administration



Solu-Medrone may be administered intravenously or intramuscularly, the preferred method for emergency use being intravenous injection given over a suitable time interval. When administering Solu-Medrone in high doses intravenously it should be given over a period of at least 30 minutes. Doses up to 250 mg should be given intravenously over a period of at least five minutes.



For intravenous infusion the initially prepared solution may be diluted with 5% dextrose in water, isotonic saline solution, or 5% dextrose in isotonic saline solution. To avoid compatibility problems with other drugs Solu-Medrone should be administered separately, only in the solutions mentioned.



Undesirable effects may be minimised by using the lowest effective dose for the minimum period (see Other special warnings and precautions).



Parenteral drug products should wherever possible be visually inspected for particulate matter and discoloration prior to administration.



Adults Dosage should be varied according to the severity of the condition, initial dosage will vary from 10 to 500 mg. In the treatment of graft rejection reactions following transplantation, a dose of up to 1 g/day may be required. Although doses and protocols have varied in studies using methylprednisolone sodium succinate in the treatment of graft rejection reactions, the published literature supports the use of doses of this level, with 500 mg to 1 g most commonly used for acute rejection. Treatment at these doses should be limited to a 48



Children In the treatment of high dose indications, such as haematological, rheumatic, renal and dermatological conditions, a dosage of 30 mg/kg/day to a maximum of 1 g/day is recommended. This dosage may be repeated for three pulses either daily or on alternate days. In the treatment of graft rejection reactions following transplantation, a dosage of 10 to 20 mg/kg/day for up to 3 days, to a maximum of 1 g/day, is recommended. In the treatment of status asthmaticus, a dosage of 1 to 4 mg/kg/day for 1



Elderly patients Solu-Medrone is primarily used in acute short



Detailed recommendations for adult dosage are as follows



In anaphylactic reactions adrenaline or noradrenaline should be administered first for an immediate haemodynamic effect, followed by intravenous injection of Solu-Medrone (methylprednisolone sodium succinate) with other accepted procedures. There is evidence that corticosteroids through their prolonged haemodynamic effect are of value in preventing recurrent attacks of acute anaphylactic reactions.



In sensitivity reactions Solu-Medrone is capable of providing relief within one half to two hours. In patients with status asthmaticus Solu-Medrone may be given at a dose of 40 mg intravenously, repeated as dictated by patient response. In some asthmatic patients it may be advantageous to administer by slow intravenous drip over a period of hours.



In graft rejection reactions following transplantation doses of up to 1 g per day have been used to suppress rejection crises, with doses of 500 mg to 1 g most commonly used for acute rejection. Treatment should be continued only until the patient's condition has stabilised; usually not beyond 48



In cerebral oedema corticosteroids are used to reduce or prevent the cerebral oedema associated with brain tumours (primary or metastatic).



In patients with oedema due to tumour, tapering the dose of corticosteroid appears to be important in order to avoid a rebound increase in intracranial pressure. If brain swelling does occur as the dose is reduced (intracranial bleeding having been ruled out), restart larger and more frequent doses parenterally. Patients with certain malignancies may need to remain on oral corticosteroid therapy for months or even life. Similar or higher doses may be helpful to control oedema during radiation therapy.



The following are suggested dosage schedules for oedemas due to brain tumour.






















































Schedule A (1)




Dose (mg)




Route in hours




Interval




Duration




Pre-operative




20




IM




3-6




 



 




During Surgery




20 to 40




IV




hourly


 


Post-operative




20




IM




3




24 hours




16




IM




3




24 hours




 



 




12




IM




3




24 hours


 


8




IM




3




24 hours


 


4




IM




3




24 hours


 


4




IM




6




24 hours


 


4




IM




12




24 hours


 










































Schedule B (2)




Dose (mg)




Route in hours




Interval Duration




Days




Pre-operative




40




IM




6




2-3




Post-operative




40




IM




6




3-5




20




Oral




6




1




 



 




12




Oral




6




1


 


8




Oral




8




1


 


4




Oral




12




1


 


4




Oral




 



 




1


 


Aim to discontinue therapy after a total of 10 days.



REFERENCES



1. Fox JL, MD. "Use of Methylprednisolone in Intracranial Surgery" Medical Annals of the District of Columbia, 34:261



2. Cantu RC, MD Harvard Neurological Service, Boston, Massachusetts. Letter on file, The Upjohn Company (February 1970).



In the treatment of acute exacerbations of multiple sclerosis in adults, the recommended dose is 1 g daily for 3 days. Solu-Medrone should be given as an intravenous infusion over at least 30 minutes.



In other indications, initial dosage will vary from 10 to 500 mg depending on the clinical problem being treated. Larger doses may be required for short



4.3 Contraindications



Solu-Medrone is contra-indicated where there is known hypersensitivity to components, in systemic infection unless specific anti-infective therapy is employed and in cerebral oedema in malaria.



4.4 Special Warnings And Precautions For Use



Warnings and Precautions



1. A Patient Information Leaflet is provided in the pack by the manufacturer.



2. Undesirable effects may be minimised by using the lowest effective dose for the minimum period. Frequent patient review is required to appropriately titrate the dose against disease activity (see Posology and method of administration).



3. Adrenal cortical atrophy develops during prolonged therapy and may persist for months after stopping treatment. In patients who have received more than physiological doses of systemic corticosteroids (approximately 6 mg methylprednisolone) for greater than 3 weeks, withdrawal should not be abrupt. How dose reduction should be carried out depends largely on whether the disease is likely to relapse as the dose of systemic corticosteroids is reduced. Clinical assessment of disease activity may be needed during withdrawal. If the disease is unlikely to relapse on withdrawal of systemic corticosteroids, but there is uncertainty about HPA suppression, the dose of systemic corticosteroid may be reduced rapidly to physiological doses. Once a daily dose of 6 mg methylprednisolone is reached, dose reduction should be slower to allow the HPA-axis to recover.



Abrupt withdrawal of systemic corticosteroid treatment, which has continued up to 3 weeks is appropriate if it considered that the disease is unlikely to relapse. Abrupt withdrawal of doses up to 32 mg daily of methylprednisolone for 3 weeks is unlikely to lead to clinically relevant HPA-axis suppression, in the majority of patients. In the following patient groups, gradual withdrawal of systemic corticosteroid therapy should be considered even after courses lasting 3 weeks or less:



• Patients who have had repeated courses of systemic corticosteroids, particularly if taken for greater than 3 weeks.



• When a short course has been prescribed within one year of cessation of long-term therapy (months or years).



• Patients who may have reasons for adrenocortical insufficiency other than exogenous corticosteroid therapy.



• Patients receiving doses of systemic corticosteroid greater than 32 mg daily of methylprednisolone.



• Patients repeatedly taking doses in the evening.



4. Patients should carry 'Steroid Treatment' cards which give clear guidance on the precautions to be taken to minimise risk and which provide details of prescriber, drug, dosage and the duration of treatment.



5. Although Solu-Medrone is not approved in the UK for use in any shock indication, the following warning statement should be adhered to. Data from a clinical study conducted to establish the efficacy of Solu-Medrone in septic shock, suggest that a higher mortality occurred in subsets of patients who entered the study with elevated serum creatinine levels or who developed a secondary infection after therapy began. Therefore this product should not be used in the treatment of septic syndrome or septic shock.



6. There have been a few reports of cardiac arrhythmias and/or circulatory collapse and/or cardiac arrest associated with the rapid intravenous administration of large doses of Solu-Medrone (greater than 500 mg administered over a period of less than 10 minutes). Bradycardia has been reported during or after the administration of large doses of methylprednisolone sodium succinate, and may be unrelated to the speed and duration of infusion.



7. Corticosteroids may mask some signs of infection, and new infections may appear during their use. Suppression of the inflammatory response and immune function increases the susceptibility to fungal, viral and bacterial infections and their severity. The clinical presentation may often be atypical and may reach an advanced stage before being recognised.



8. Chickenpox is of serious concern since this normally minor illness may be fatal in immunosuppressed patients. Patients (or parents of children) without a definite history of chickenpox should be advised to avoid close personal contact with chickenpox or herpes zoster and if exposed they should seek urgent medical attention. Passive immunization with varicella/zoster immunoglobin (VZIG) is needed by exposed non-immune patients who are receiving systemic corticosteroids or who have used them within the previous 3 months; this should be given within 10 days of exposure to chickenpox. If a diagnosis of chickenpox is confirmed, the illness warrants specialist care and urgent treatment. Corticosteroids should not be stopped and the dose may need to be increased.



9. Live vaccines should not be given to individuals with impaired immune responsiveness. The antibody response to other vaccines may be diminished.



10. The use of Solu-Medrone in active tuberculosis should be restricted to those cases of fulminating or disseminated tuberculosis in which the corticosteroid is used for the management of the disease in conjunction with an appropriate anti-tuberculous regimen. If corticosteroids are indicated in patients with latent tuberculosis or tuberculin reactivity, close observation is necessary as reactivation of the disease may occur. During prolonged corticosteroid therapy, these patients should receive chemoprophylaxis.



11. Rarely anaphylactoid reactions have been reported following parenteral Solu-Medrone therapy. Physicians using the drug should be prepared to deal with such a possibility. Appropriate precautionary measures should be taken prior to administration, especially when the patient has a history of drug allergy.



12. Care should be taken for patients receiving cardioactive drugs such as digoxin because of steroid induced electrolyte disturbance/potassium loss (see Undesirable effects).



Special precautions



Particular care is required when considering the use of systemic corticosteroids in patients with the following conditions and frequent patient monitoring is necessary.



1. Osteoporosis (post-menopausal females are particularly at risk).



2. Hypertension or congestive heart failure.



3. Existing or previous history of severe affective disorders (especially previous steroid psychosis).



4. Diabetes mellitus (or a family history of diabetes).



5. History of tuberculosis.



6. Glaucoma (or a family history of glaucoma).



7. Previous corticosteroid-induced myopathy.



8. Liver failure or cirrhosis.



9. Renal insufficiency.



10. Epilepsy.



11. Peptic ulceration.



12. Fresh intestinal anastomoses.



13. Predisposition to thrombophlebitis.



14. Abscess or other pyogenic infections.



15. Ulcerative colitis.



16. Diverticulitis.



17. Myasthenia gravis.



18. Ocular herpes simplex, for fear of corneal perforation.



19. Hypothyroidism.



Use in children Corticosteroids cause growth retardation in infancy, childhood and adolescence, which may be irreversible. Treatment should be limited to the minimum dosage for the shortest possible time. In order to minimise suppression of the hypothalamo



Use in the elderly The common adverse effects of systemic corticosteroids may be associated with more serious consequences in old age, especially osteoporosis, hypertension, hypokalaemia, diabetes, susceptibility to infection and thinning of the skin. Close clinical supervision is required to avoid life-threatening reactions.



4.5 Interaction With Other Medicinal Products And Other Forms Of Interaction



1. Convulsions have been reported with concurrent use of methylprednisolone and cyclosporin. Since concurrent administration of these agents results in a mutual inhibition of metabolism, it is possible that convulsions and other adverse events associated with the individual use of either drug may be more apt to occur.



2. Drugs that induce hepatic enzymes, such as rifampicin, rifabutin, carbamazepine, phenobarbitone, phenytoin, primidone, and aminoglutethimide enhance the metabolism of corticosteroids and its therapeutic effects may be reduced.



3. Drugs such as erythromycin and ketoconazole may inhibit the metabolism of corticosteroids and thus decrease their clearance.



4. Steroids may reduce the effects of anticholinesterases in myasthenia gravis. The desired effects of hypoglycaemic agents (including insulin), anti-hypertensives and diuretics are antagonised by corticosteroids, and the hypokalaemic effects of acetazolamide, loop diuretics, thiazide diuretics and carbenoxolone are enhanced.



5. The efficacy of coumarin anticoagulants may be enhanced by concurrent corticosteroid therapy and close monitoring of the INR or prothrombin time is required to avoid spontaneous bleeding.



6. The renal clearance of salicylates is increased by corticosteroids and steroid withdrawal may result in salicylate intoxication. Salicylates and non-steroidal anti-inflammatory agents should be used cautiously in conjunction with corticosteroids in hypothrombinaemia.



7. Steroids have been reported to interact with neuromuscular blocking agents such as pancuronium with partial reversal of the neuromuscular block.



4.6 Pregnancy And Lactation



Pregnancy



The ability of corticosteroids to cross the placenta varies between individual drugs, however, methylprednisolone does cross the placenta.



Administration of corticosteroids to pregnant animals can cause abnormalities of foetal development including cleft palate, intra-uterine growth retardation and affects on brain growth and development. There is no evidence that corticosteroids result in an increased incidence of congenital abnormalities, such as cleft palate in man, however, when administered for long periods or repeatedly during pregnancy, corticosteroids may increase the risk of intra-uterine growth retardation. Hypoadrenalism may, in theory , occur in the neonate following prenatal exposure to corticosteroids but usually resolves spontaneously following birth and is rarely clinically important. As with all drugs, corticosteroids should only be prescribed when the benefits to the mother and child outweigh the risks. When corticosteroids are essential, however, patients with normal pregnancies may be treated as though they were in the non-gravid state.



Lactation



Corticosteroids are excreted in small amounts in breast milk, however, doses of up to 40 mg daily of methylprednisolone are unlikely to cause systemic effects in the infant. Infants of mothers taking higher doses than this may have a degree of adrenal suppression, but the benefits of breastfeeding are likely to outweigh any theoretical risk.



4.7 Effects On Ability To Drive And Use Machines



None stated.



4.8 Undesirable Effects



Under normal circumstances Solu-Medrone therapy would be considered as short-term. However, the possibility of side-effects attributable to corticosteroid therapy should be recognised, particularly when high-dose therapy is being used (see Special warnings and special precautions for use). Such side-effects include:



PARENTERAL CORTICOSTEROID THERAPY - Anaphylactic reaction with or without circulatory collapse, cardiac arrest, bronchospasm, cardiac arrhythmias, hypotension or hypertension.



GASTRO-INTESTINAL - Dyspepsia, peptic ulceration with perforation and haemorrhage, abdominal distension, oesophageal ulceration, oesophageal candidiasis, acute pancreatitis. Nausea, vomiting and bad taste in mouth may occur especially with rapid administration.



Increases in alanine transaminase (ALT, SGPT) aspartate transaminase (AST, SGOT) and alkaline phosphatase have been observed following corticosteroid treatment. These changes are usually small, not associated with any clinical syndrome and are reversible upon discontinuation.



ANTI-INFLAMMATORY AND IMMUNOSUPPRESSIVE EFFECTS - Increased susceptibility and severity of infections with suppression of clinical symptoms and signs, opportunistic infections, may suppress reactions to skin tests, recurrence of dormant tuberculosis (see Special warnings and special precautions for use).



MUSCULOSKELETAL - Proximal myopathy, osteoporosis, vertebral and long bone fractures, avascular osteonecrosis, tendon rupture.



FLUID AND ELECTROLYTE DISTURBANCE - Sodium and water retention, potassium loss, hypertension, hypokalaemic alkalosis, congestive heart failure in susceptible patients.



DERMATOLOGICAL - Impaired healing, petechiae and ecchymosis, skin atrophy, bruising, striae, telangiectasia, acne.



ENDOCRINE/METABOLIC - Suppression of the hypothalamo



NEUROPSYCHIATRIC - Euphoria, psychological dependence, mood swings, depression, personality changes, insomnia. Increased intra-cranial pressure with papilloedema in children (pseudotumour cerebri), usually after treatment withdrawal. Psychosis, aggravation of schizophrenia, seizures.



OPHTHALMIC - Increased intra



GENERAL - Leucocytosis, hypersensitivity including anaphylaxis, thrombo-embolism, malaise.



WITHDRAWAL SYMPTOMS - Too rapid a reduction of corticosteroid dosage following prolonged treatment can lead to acute adrenal insufficiency, hypotension and death. However, this is more applicable to corticosteroids with an indication where continuous therapy is given (see Special warnings and special precautions for use).



A 'withdrawal syndrome' may also occur including, fever, myalgia, arthralgia, rhinitis, conjunctivitis, painful itchy skin nodules and loss of weight.



4.9 Overdose



There is no clinical syndrome of acute overdosage with Solu-Medrone. Methylprednisolone is dialysable. Following chronic overdosage the possibility of adrenal suppression should be guarded against by gradual diminution of dose levels over a period of time. In such event the patient may require to be supported during any further stressful episode.



5. Pharmacological Properties



5.1 Pharmacodynamic Properties



Medrone is a corticosteroid with an anti-inflammatory activity at least five times that of hydrocortisone. An enhanced separation of glucocorticoid and mineralocorticoid effect results in a reduced incidence of sodium and water retention.



5.2 Pharmacokinetic Properties



Methylprednisolone is extensively bound to plasma proteins, mainly to globulin and less so to albumin. Only unbound corticosteroid has pharmacological effects or is metabolised. Metabolism occurs in the liver and to a lesser extent in the kidney. Metabolites are excreted in the urine.



Mean elimination half-life ranges from 2.4 to 3.5 hours in normal healthy adults and appears to be independent of the route of administration.



Total body clearance following intravenous or intramuscular injection of methylprednisolone to healthy adult volunteers is approximately 15-16l/hour. Peak methylprednisolone plasma levels of 33.67 mcg/100 ml were achieved in 2 hours after a single 40 mg i.m. injection to 22 adult male volunteers.



6. Pharmaceutical Particulars



6.1 List Of Excipients



Sodium biphosphate and sodium phosphate.



The 40 mg vial also contains lactose.



6.2 Incompatibilities



None stated.



6.3 Shelf Life



Shelf-life of the medicinal product as packaged for sale: 60 months.



After reconstitution with Sterile Water for injections, use immediately, discard any remainder.



6.4 Special Precautions For Storage



Store below 25°C.



Refer to Section 4.2 Dosage and Administration. No diluents other than those referred to are recommended. Parenteral drug products should be inspected visually for particulate matter and discoloration prior to administration.



6.5 Nature And Contents Of Container



Type I clear glass vial with butyl rubber plug and flip top seal.



Each vial of Solu-Medrone 125 mg contains the equivalent of 125 mg of methylprednisolone as the sodium succinate for reconstitution with 2 ml of Sterile Water for Injections.



6.6 Special Precautions For Disposal And Other Handling



No special requirements.



7. Marketing Authorisation Holder



Pharmacia Limited



Davy Avenue



Milton Keynes



MK5 8PH



UK



8. Marketing Authorisation Number(S)



Solu- Medrone 125 mg PL 0032/0034



9. Date Of First Authorisation/Renewal Of The Authorisation



PL 0032/ 0034, date of first authorisation: 21 February 1990



Last renewal date: 20 August 1996



10. Date Of Revision Of The Text



May 2001



Legal Category


POM.





Venaxx XL 150 mg





1. Name Of The Medicinal Product



Venaxx XL 150 mg prolonged-release capsules, hard


2. Qualitative And Quantitative Composition



One prolonged-release capsule, hard contains venlafaxine hydrochloride equivalent to 150 mg of venlafaxine.



For a full list of excipients, see section 6.1.



3. Pharmaceutical Form



Prolonged-release capsule, hard.



Venaxx XL 150 mg: scarlet opaque hard gelatine capsules (size 00) containing three round, biconvex film-coated tablets, with imprint VEN on cap and 150 on body.



4. Clinical Particulars



4.1 Therapeutic Indications



Treatment of major depressive episodes.



For prevention of recurrence of major depressive episodes.



Treatment of social anxiety disorder.



4.2 Posology And Method Of Administration



Major depressive episodes



The recommended starting dose for prolonged-release venlafaxine is 75 mg given once daily. Patients not responding to the initial 75 mg/day dose may benefit from dose increases up to a maximum dose of 375 mg/day. Dosage increases can be made at intervals of 2 weeks or more. If clinically warranted due to symptom severity, dose increases can be made at more frequent intervals, but not less than 4 days.



Because of the risk of dose-related adverse effects, dose increments should be made only after a clinical evaluation (see section 4.4). The lowest effective dose should be maintained.



Patients should be treated for a sufficient period of time, usually several months or longer. Treatment should be reassessed regularly on a case-by-case basis. Longer-term treatment may also be appropriate for prevention of recurrence of major depressive episodes (MDE). In most of the cases, the recommended dose in prevention of recurrence of MDE is the same as the one used during the current episode.



Antidepressive medicinal products should continue for at least six months following remission.



Social anxiety disorder



The recommended dose for prolonged-release venlafaxine is 75 mg given once daily. There is no evidence that higher doses confer any additional benefit.



However, in individual patients not responding to the initial 75 mg/day, increases up to a maximum dose of 225 mg/day may be considered. Dosage increases can be made at intervals of 2 weeks or more.



Because of the risk of dose-related adverse effects, dose increments should be made only after a clinical evaluation (see section 4.4). The lowest effective dose should be maintained.



Patients should be treated for a sufficient period of time, usually several months or longer. Treatment should be reassessed regularly, on a case-by-case basis.



Use in elderly patients



No specific dose adjustments of venlafaxine are considered necessary based on patient age alone. However, caution should be exercised in treating the elderly (e.g., due to the possibility of renal impairment, the potential for changes in neurotransmitter sensitivity and affinity occurring with aging). The lowest effective dose should always be used, and patients should be carefully monitored when an increase in the dose is required.



Use in children and adolescents under the age of 18 years



Venlafaxine is not recommended for use in children and adolescents.



Controlled clinical studies in children and adolescents with major depressive disorder failed to demonstrate efficacy and do not support the use of venlafaxine in these patients (see sections 4.4 and 4.8).



The efficacy and safety of venlafaxine for other indications in children and adolescents under the age of 18 have not been established.



Use in patients with hepatic impairment



In patients with mild and moderate hepatic impairment, in general a 50% dose reduction should be considered. However, due to inter-individual variability in clearance, individualisation of dosage may be desirable.



There are limited data in patients with severe hepatic impairment. Caution is advised, and a dose reduction by more than 50% should be considered. The potential benefit should be weighed against the risk in the treatment of patients with severe hepatic impairment.



Use in patients with renal impairment



Although no change in dosage is necessary for patients with glomerular filtration rate (GFR) between 30-70 ml/minute, caution is advised. For patients that require haemodialysis and in patients with severe renal impairment (GFR < 30 ml/min), the dose should be reduced by 50%. Because of inter-individual variability in clearance in these patients, individualisation of dosage may be desirable.



Withdrawal symptoms seen on discontinuation of venlafaxine



Abrupt discontinuation should be avoided. When stopping treatment with venlafaxine, the dose should be gradually reduced over a period of at least one to two weeks in order to reduce the risk of withdrawal reactions (see sections 4.4 and 4.8). If intolerable symptoms occur following a decrease in the dose or upon discontinuation of treatment, then resuming the previously prescribed dose may be considered. Subsequently, the physician may continue decreasing the dose, but at a more gradual rate.



For oral use.



It is recommended that venlafaxine prolonged-release capsules be taken with food, at approximately the same time each day. Capsules must be swallowed whole with fluid and not divided, crushed, chewed, or dissolved.



Patients treated with venlafaxine immediate-release tablets may be switched to venlafaxine prolonged-release capsules at the nearest equivalent daily dosage. For example, venlafaxine immediate-release tablets 37.5 mg twice daily may be switched to venlafaxine prolonged-release capsules 75 mg once daily. Individual dosage adjustments may be necessary.



4.3 Contraindications



Hypersensitivity to the active substance or to any of the excipients.



Concomitant treatment with irreversible monoamine oxidase inhibitors (MAOIs) is contraindicated due to the risk of serotonin syndrome with symptoms such as agitation, tremor and hyperthermia. Venlafaxine must not be initiated for at least 14 days after discontinuation of treatment with an irreversible MAOI.



Venlafaxine must be discontinued for at least 7 days before starting treatment with an irreversible MAOI (see sections 4.4 and 4.5).



4.4 Special Warnings And Precautions For Use



Suicide/suicidal thoughts or clinical worsening



Depression is associated with an increased risk of suicidal thoughts, self-harm and suicide (suicide-related events). This risk persists until significant remission occurs. As improvement may not occur during the first few weeks or more of treatment, patients should be closely monitored until such improvement occurs. It is general clinical experience that the risk of suicide may increase in the early stages of recovery.



Other psychiatric conditions for which venlafaxine is prescribed can also be associated with an increased risk of suicide-related events. In addition, these conditions may be co-morbid with major depressive disorder. The same precautions observed when treating patients with major depressive disorder should therefore be observed when treating patients with other psychiatric disorders.



Patients with a history of suicide-related events, or those exhibiting a significant degree of suicidal ideation prior to commencement of treatment, are known to be at greater risk of suicidal thoughts or suicide attempts, and should receive careful monitoring during treatment. A meta-analysis of placebo-controlled clinical trials of antidepressant drugs in adult patients with psychiatric disorders showed an increased risk of suicidal behaviour with antidepressants compared to placebo in patients less than 25 years old.



Close supervision of patients, and in particular those at high risk, should accompany drug therapy, especially in early treatment and following dose changes. Patients (and caregivers of patients) should be alerted about the need to monitor for any clinical worsening, suicidal behaviour or thoughts and unusual changes in behaviour, and to seek medical advice immediately if these symptoms present.



Use in children and adolescents under 18 years of age



Venlafaxine should not be used in the treatment of children and adolescents under the age of 18 years. Suicide-related behaviours (suicide attempt and suicidal thoughts) and hostility (predominantly aggression, oppositional behaviour and anger) were more frequently observed in clinical trials among children and adolescents treated with antidepressants compared to those treated with placebo. If, based on clinical need, a decision to treat is nevertheless taken, the patient should be carefully monitored for the appearance of suicidal symptoms. In addition, long-term safety data in children and adolescents concerning growth, maturation and cognitive and behavioural development are lacking.



Serotonin syndrome



As with other serotonergic agents, serotonin syndrome, a potentially life-threatening condition, may occur with venlafaxine treatment, particularly with concomitant use of other agents, such as MAO-inhibitors, that may affect the serotonergic neurotransmitter systems (see sections 4.3 and 4.5).



Serotonin syndrome symptoms may include mental status changes (e.g., agitation, hallucinations, coma), autonomic instability (e.g., tachycardia, labile blood pressure, hyperthermia), neuromuscular aberrations (e.g., hyperreflexia, incoordination) and/or gastrointestinal symptoms (e.g., nausea, vomiting, diarrhoea).



Narrow-angle glaucoma



Mydriasis may occur in association with venlafaxine. It is recommended that patients with raised intraocular pressure or patients at risk for acute narrow-angle glaucoma (angle-closure glaucoma) be closely monitored.



Blood pressure



Dose-related increases in blood pressure have been commonly reported with venlafaxine. In some cases, severely elevated blood pressure requiring immediate treatment has been reported in postmarketing experience. All patients should be carefully screened for high blood pressure and pre-existing hypertension should be controlled before initiation of treatment. Blood pressure should be reviewed periodically, after initiation of treatment and after dose increases. Caution should be exercised in patients whose underlying conditions might be compromised by increases in blood pressure, e.g., those with impaired cardiac function.



Heart rate



Increases in heart rate can occur, particularly with higher doses. Caution should be exercised in patients whose underlying conditions might be compromised by increases in heart rate.



Cardiac disease and risk of arrhythmia



Venlafaxine has not been evaluated in patients with a recent history of myocardial infarction or unstable heart disease. Therefore, it should be used with caution in these patients.



In postmarketing experience, fatal cardiac arrhythmias have been reported with the use of venlafaxine, especially in overdose. The balance of risks and benefits should be considered before prescribing venlafaxine to patients at high risk of serious cardiac arrhythmia.



Convulsions



Convulsions may occur with venlafaxine therapy. As with all antidepressants, venlafaxine should be introduced with caution in patients with a history of convulsions, and concerned patients should be closely monitored. Treatment should be discontinued in any patient who develops seizures.



Hyponatraemia



Cases of hyponatraemia and/or the Syndrome of Inappropriate Antidiuretic Hormone (SIADH) secretion may occur with venlafaxine. This has most frequently been reported in volume-depleted or dehydrated patients. Elderly patients, patients taking diuretics, and patients who are otherwise volume-depleted may be at greater risk for this event.



Abnormal bleeding



Medicinal products that inhibit serotonin uptake may lead to reduced platelet function. The risk of skin and mucous membrane bleeding, including gastrointestinal haemorrhage, may be increased in patients taking venlafaxine. As with other serotonin-reuptake inhibitors, venlafaxine should be used cautiously in patients predisposed to bleeding, including patients on anticoagulants and platelet inhibitors.



Serum cholesterol



Clinically relevant increases in serum cholesterol were recorded in 5.3% of venlafaxine-treated patients and 0.0% of placebo-treated patients treated for at least 3 months in placebo-controlled clinical trials. Measurement of serum cholesterol levels should be considered during long-term treatment.



Co-administration with weight loss agents



The safety and efficacy of venlafaxine therapy in combination with weight loss agents, including phentermine, have not been established. Co-administration of venlafaxine and weight loss agents is not recommended. Venlafaxine is not indicated for weight loss alone or in combination with other products.



Mania/hypomania



Mania/hypomania may occur in a small proportion of patients with mood disorders who have received antidepressants, including venlafaxine. As with other antidepressants, venlafaxine should be used cautiously in patients with a history or family history of bipolar disorder.



Aggression



Aggression may occur in a small number of patients who have received antidepressants, including venlafaxine. This has been reported under initiation, dose changes and discontinuation of treatment.



As with other antidepressants, venlafaxine should be used cautiously in patients with a history of aggression.



Discontinuation of treatment



Withdrawal symptoms, when treatment is discontinued, are common, particularly if discontinuation is abrupt (see section 4.8). In clinical trials, adverse events seen on treatment discontinuation (tapering and post-tapering) occurred in approximately 31% of patients treated with venlafaxine and 17% of patients taking placebo.



The risk of withdrawal symptoms may be dependent on several factors, including the duration and dose of therapy and the rate of dose reduction. Dizziness, sensory disturbances (including paraesthesia), sleep disturbances (including insomnia and intense dreams), agitation or anxiety, nausea and/or vomiting, tremor and headache are the most commonly reported reactions. Generally, these symptoms are mild to moderate; however, in some patients they may be severe in intensity. They usually occur within the first few days of discontinuing treatment, but there have been very rare reports of such symptoms in patients who have inadvertently missed a dose. Generally, these symptoms are self-limiting and usually resolve within 2 weeks, though in some individuals they may be prolonged (2-3 months or more). It is therefore advised that venlafaxine should be gradually tapered when discontinuing treatment over a period of several weeks or months, according to the patient's needs (see section 4.2).



Akathisia/psychomotor restlessness



The use of venlafaxine has been associated with the development of akathisia, characterised by a subjectively unpleasant or distressing restlessness and need to move often accompanied by an inability to sit or stand still. This is most likely to occur within the first few weeks of treatment. In patients who develop these symptoms, increasing the dose may be detrimental.



Dry mouth



Dry mouth is reported in 10% of patients treated with venlafaxine. This may increase the risk of caries, and patients should be advised upon the importance of dental hygiene.



4.5 Interaction With Other Medicinal Products And Other Forms Of Interaction



Monoamine Oxidase Inhibitors (MAOI)



Irreversible non-selective MAOIs



Venlafaxine must not be used in combination with irreversible non-selective MAOIs. Venlafaxine must not be initiated for at least 14 days after discontinuation of treatment with an irreversible non-selective MAOI. Venlafaxine must be discontinued for at least 7 days before starting treatment with an irreversible non-selective MAOI (see sections 4.3 and 4.4).



Reversible, selective MAO-A inhibitor (moclobemide)



Due to the risk of serotonin syndrome, the combination of venlafaxine with a reversible and selective MAOI, such as moclobemide, is not recommended. Following treatment with a reversible MAO-inhibitor, a shorter withdrawal period than 14 days may be used before initiation of venlafaxine treatment. It is recommended that venlafaxine should be discontinued for at least 7 days before starting treatment with a reversible MAOI (see section 4.4).



Reversible, non-selective MAOI (linezolid)



The antibiotic linezolid is a weak reversible and non-selective MAOI and should not be given to patients treated with venlafaxine (see section 4.4).



Severe adverse reactions have been reported in patients who have recently been discontinued from an MAOI and started on venlafaxine, or have recently had venlafaxine therapy discontinued prior to initiation of an MAOI. These reactions have included tremor, myoclonus, diaphoresis, nausea, vomiting, flushing, dizziness, and hyperthermia with features resembling neuroleptic malignant syndrome, seizures, and death.



Serotonin syndrome



As with other serotonergic agents, serotonin syndrome may occur with venlafaxine treatment, particularly with concomitant use of other agents that may affect the serotonergic neurotransmitter system (including triptans, SSRIs, SNRIs, lithium, sibutramine, tramadol, or St. John's Wort [Hypericum perforatum]), with medicinal agents which impair metabolism of serotonin (including MAOIs), or with serotonin precursors (such as tryptophan supplements).



If concomitant treatment of venlafaxine with an SSRI, an SNRI or a serotonin receptor agonist (triptan) is clinically warranted, careful observation of the patient is advised, particularly during treatment initiation and dose increases. The concomitant use of venlafaxine with serotonin precursors (such as tryptophan supplements) is not recommended (see section 4.4).



CNS-active substances



The risk of using venlafaxine in combination with other CNS-active substances has not been systematically evaluated. Consequently, caution is advised when venlafaxine is taken in combination with other CNS-active substances.



Ethanol



Venlafaxine has been shown not to increase the impairment of mental and motor skills caused by ethanol. However, as with all CNS-active substances, patients should be advised to avoid alcohol consumption.



Effect of other medicinal products on venlafaxine



Ketoconazole (CYP3A4 inhibitor)



A pharmacokinetic study with ketoconazole in CYP2D6 extensive (EM) and poor metabolisers (PM) resulted in higher AUC of venlafaxine (70% and 21% in CYP2D6 PM and EM subjects, respectively) and O-desmethylvenlafaxine (33% and 23% in CYP2D6 PM and EM subjects, respectively) following administration of ketoconazole. Concomitant use of CYP3A4 inhibitors (e.g., atazanavir, clarithromycin, indinavir, itraconazole, voriconazole, posaconazole, ketoconazole, nelfinavir, ritonavir, saquinavir, telithromycin) and venlafaxine may increase levels of venlafaxine and O-desmethylvenlafaxine. Therefore, caution is advised if a patient's therapy includes a CYP3A4 inhibitor and venlafaxine concomitantly.



Effect of venlafaxine on other medicinal products



Lithium



Serotonin syndrome may occur with the concomitant use of venlafaxine and lithium (see Serotonin syndrome).



Diazepam



Venlafaxine has no effects on the pharmacokinetics and pharmacodynamics of diazepam and its active metabolite, desmethyldiazepam. Diazepam does not appear to affect the pharmacokinetics of either venlafaxine or O-desmethylvenlafaxine. It is unknown whether a pharmacokinetic and/or pharmacodynamic interaction with other benzodiazepines exists.



Imipramine



Venlafaxine did not affect the pharmacokinetics of imipramine and 2-OH-imipramine. There was a dose-dependent increase of 2-OH-desipramine AUC by 2.5 to 4.5-fold when venlafaxine 75 mg to 150 mg daily was administered. Imipramine did not affect the pharmacokinetics of venlafaxine and O-desmethylvenlafaxine. The clinical significance of this interaction is unknown. Caution should be exercised with co-administration of venlafaxine and imipramine.



Haloperidol



A pharmacokinetic study with haloperidol has shown a 42% decrease in total oral clearance, a 70% increase in AUC, an 88% increase in Cmax, but no change in half-life for haloperidol. This should be taken into account in patients treated with haloperidol and venlafaxine concomitantly. The clinical significance of this interaction is unknown.



Risperidone



Venlafaxine increased the risperidone AUC by 50%, but did not significantly alter the pharmacokinetic profile of the total active moiety (risperidone plus 9-hydroxyrisperidone). The clinical significance of this interaction is unknown.



Metoprolol



Concomitant administration of venlafaxine and metoprolol to healthy volunteers in a pharmacokinetic interaction study for both medicinal products resulted in an increase of plasma concentrations of metoprolol by approximately 30-40% without altering the plasma concentrations of its active metabolite, α-hydroxymetoprolol. The clinical relevance of this finding in hypertensive patients is unknown. Metoprolol did not alter the pharmacokinetic profile of venlafaxine or its active metabolite, O-desmethylvenlafaxine. Caution should be exercised with co-administration of venlafaxine and metoprolol.



Indinavir



A pharmacokinetic study with indinavir has shown a 28% decrease in AUC and a 36% decrease in Cmax for indinavir. Indinavir did not affect the pharmacokinetics of venlafaxine and O-desmethylvenlafaxine. The clinical significance of this interaction is unknown.



4.6 Pregnancy And Lactation



Pregnancy



There are no adequate data from the use of venlafaxine in pregnant women.



Studies in animals have shown reproductive toxicity (see section 5.3). The potential risk for humans is unknown. Venlafaxine must only be administered to pregnant women if the expected benefits outweigh any possible risk.



As with other serotonin reuptake inhibitors (SSRIs/SNRIs), discontinuation symptoms may occur in the newborns if venlafaxine is used until or shortly before birth. Some newborns exposed to venlafaxine late in the third trimester have developed complications requiring tube-feeding, respiratory support or prolonged hospitalisation. Such complications can arise immediately upon delivery.



Epidemiological data have suggested that the use of SSRIs in pregnancy, particularly in late pregnancy, may increase the risk of persistent pulmonary hypertension in the newborn (PPHN). Although no studies have investigated an association of PPHN to SNRI treatment, this potential risk cannot be ruled out with Venaxx XL taking into account the related mechanism of action (inhibition of the re-uptake of serotonin).



The following symptoms may be observed in neonates if the mother has used an SSRI/SNRI late in pregnancy: irritability, tremor, hypotonia, persistent crying, and difficulty in sucking or in sleeping. These symptoms may be due to either serotonergic effects or exposure symptoms. In the majority of cases, these complications are observed immediately or within 24 hours after partus.



Lactation



Venlafaxine and its active metabolite, O-desmethylvenlafaxine, are excreted in breast milk. A risk to the suckling child cannot be excluded. Therefore, a decision to continue/discontinue breast-feeding or to continue/discontinue therapy with venlafaxine should be made, taking into account the benefit of breast-feeding to the child and the benefit of venlafaxine therapy to the woman.



4.7 Effects On Ability To Drive And Use Machines



Any psychoactive medicinal product may impair judgment, thinking, and motor skills. Therefore, any patient receiving venlafaxine should be cautioned about their ability to drive or operate hazardous machinery.



4.8 Undesirable Effects



The most commonly (>1/10) reported adverse reactions in clinical studies were nausea, dry mouth, headache and sweating (including night sweats).



Adverse reactions are listed below by system organ class and frequency.



Frequencies are defined as: very common (












































































Body System




Very Common




Common




Uncommon




Rare




Not Known




Haematological / Lymphatic



 

 


Ecchymosis, Gastrointestinal haemorrhage



 


Mucous membrane bleeding, Prolonged bleeding time, Thrombocytopaenia, Blood dyscrasias, (including agranulocytosis, aplastic anaemia, neutropaenia and pancytopaenia)




Metabolic/ Nutritional



 


Serum cholesterol increased, Weight loss




Weight gain



 


Abnormal liver function tests, Hyponatraemia, Hepatitis, Syndrome of Inappropriate Antidiuretic Hormone Secretion (SIADH), Prolactin increased




Nervous




Dry mouth (10.0%), Headache (30.3%)*




Abnormal dreams, Decreased libido, Dizziness, Increased muscle tonus (hypertonia), Insomnia, Nervousness, Paresthesia, Sedation, Tremor, Confusion, Depersonalisation




Apathy, Hallucinations, Myoclonus, Agitation, Impaired coordination and balance




Akathisia/ Psychomotor restlessness, Convulsion, Manic reaction




Neuroleptic Malignant Syndrome (NMS), Serotonergic syndrome, Delirium, Extrapyramidal reactions (including dystonia and dyskinaesia), Tardive dyskinaesia, Suicidal ideation and behaviours**




Special Senses



 


Abnormality of accommodation, Mydriasis, Visual disturbance,




Altered taste sensation, Tinnitus



 


Angle-closure glaucoma




Cardiovascular



 


Hypertension, Vasodilatation (mostly hot flashes/flushes), Palpitations




Postural hypotension, Syncope, Tachycardia



 


Hypotension, QT prolongation, Ventricular fibrillation, Ventricular tachycardia (including torsade de pointes)




Respiratory



 


Yawning



 

 


Pulmonary eosinophilia




Digestive




Nausea (20.0%)




Appetite decreased (anorexia), Constipation, Vomiting




Bruxism, Diarrhoea



 


Pancreatitis




Skin




Sweating (including night sweats) [12.2%]



 


Rash, Alopecia



 


Erythema multiforme, Toxic epidermal necrolysis, Stevens-Johnson syndrome, Pruritus, Urticaria




Musculoskeletal



 

 

 

 


Rhabdomyolysis




Urogenital



 


Abnormal ejaculation/orgasm (males), Anorgasmia, Erectile dysfunction (impotence), Urination impaired (mostly hesitancy), Menstrual disorders associated with increased bleeding or increased irregular bleeding (e.g., menorrhagia, metrorrhagia), Pollakiuria




Abnormal orgasm (females), Urinary retention



 

 


Body as a Whole



 


Asthenia (fatigue), Chills




Photosensitivity reaction



 


Anaphylaxis



*In pooled clinical trials, the incidence of headache was 30.3% with venlafaxine versus 31.3% with placebo.



**Cases of suicidal ideation and suicidal behaviours have been reported during venlafaxine therapy or early after treatment discontinuation (see section 4.4).



Discontinuation of venlafaxine (particularly when abrupt) commonly leads to withdrawal symptoms. Dizziness, sensory disturbances (including paraethesia), sleep disturbances (including insomnia and intense dreams), agitation or anxiety, nausea and/or vomiting, tremor, headache and flu syndrome are the most commonly reported reactions. Generally, these events are mild to moderate and are self-limiting; however, in some patients, they may be severe and/or prolonged. It is therefore advised that when venlafaxine treatment is no longer required, gradual discontinuation by dose tapering should be carried out (see sections 4.2 and 4.4).



Paediatric patients



In general, the adverse reaction profile of venlafaxine (in placebo-controlled clinical trials) in children and adolescents (ages 6 to 17) was similar to that seen for adults. As with adults, decreased appetite, weight loss, increased blood pressure, and increased serum cholesterol were observed (see section 4.4).



In paediatric clinical trials the adverse reaction suicidal ideation was observed. There were also increased reports of hostility and, especially in major depressive disorder, self-harm.



Particularly, the following adverse reactions were observed in paediatric patients: abdominal pain, agitation, dyspepsia, ecchymosis, epistaxis, and myalgia.



4.9 Overdose



In postmarketing experience, overdose with venlafaxine was reported predominantly in combination with alcohol and/or other medicinal products. The most commonly reported events in overdose include tachycardia, changes in level of consciousness (ranging from somnolence to coma), mydriasis, convulsion, and vomiting. Other reported events include electrocardiographic changes (e.g., prolongation of QT interval, bundle branch block, QRS prolongation), ventricular tachycardia, bradycardia, hypotension, vertigo, and death.



Published retrospective studies report that venlafaxine overdosage may be associated with an increased risk of fatal outcomes compared to that observed with SSRI antidepressant products, but lower than that for tricyclic antidepressants. Epidemiological studies have shown that venlafaxine-treated patients have a higher burden of suicide risk factors than SSRI patients. The extent to which the finding of an increased risk of fatal outcomes can be attributed to the toxicity of venlafaxine in overdosage, as opposed to some characteristics of venlafaxine-treated patients, is not clear. Prescriptions for venlafaxine should be written for the smallest quantity of the medicinal product consistent with good patient management in order to reduce the risk of overdose.



Recommended treatment



General supportive and symptomatic measures are recommended; cardiac rhythm and vital signs must be monitored. When there is a risk of aspiration, induction of emesis is not recommended. Gastric lavage may be indicated if performed soon after ingestion or in symptomatic patients. Administration of activated charcoal may also limit absorption of the active substance. Forced diuresis, dialysis, hemoperfusion and exchange transfusion are unlikely to be of benefit. No specific antidotes for venlafaxine are known.



5. Pharmacological Properties



5.1 Pharmacodynamic Properties



Pharmacotherapeutic group: Other antidepressants - ATC code: NO6A X16.



The mechanism of venlafaxine's antidepressant action in humans is believed to be associated with its potentiation of neurotransmitter activity in the central nervous system. Preclinical studies have shown that venlafaxine and its major metabolite, O-desmethylvenlafaxine (ODV), are inhibitors of serotonin and noradrenaline reuptake. Venlafaxine also weakly inhibits dopamine uptake. Venlafaxine and its active metabolite reduce β-adrenergic responsiveness after both acute (single dose) and chronic administration. Venlafaxine and ODV are very similar with respect to their overall action on neurotransmitter reuptake and receptor binding.



Venlafaxine has virtually no affinity for rat brain muscarinic, cholinergic, H1-histaminergic or α1-adrenergic receptors in vitro. Pharmacological activity at these receptors may be related to various side effects seen with other antidepressant medicinal products, such as anticholinergic, sedative and cardiovascular side effects.



Venlafaxine does not possess monoamine oxidase (MAO) inhibitory activity.



In vitro studies revealed that venlafaxine has virtually no affinity for opiate or benzodiazepine sensitive receptors.



Major depressive episodes



The efficacy of venlafaxine immediate-release as a treatment for major depressive episodes was demonstrated in five randomised, double-blind, placebo-controlled, short-term trials ranging from 4 to 6 weeks duration, for doses up to 375 mg/day. The efficacy of venlafaxine prolonged-release as a treatment for major depressive episodes was established in two placebo-controlled, short-term studies for 8 and 12 weeks duration, which included a dose range of 75 to 225 mg/day.



In one longer-term study, adult outpatients who had responded during an 8-week open trial on venlafaxine prolonged-release (75, 150, or 225 mg) were randomised to continuation of their same venlafaxine prolonged-release dose or to placebo, for up to 26 weeks of observation for relapse.



In a second longer-term study, the efficacy of venlafaxine in prevention of recurrent depressive episodes for a 12-month period was established in a placebo-controlled double-blind clinical trial in adult outpatients with recurrent major depressive episodes who had responded to venlafaxine treatment (100 to 200 mg/day, on a b.i.d. schedule) on the last episode of depression.



Social anxiety disorder



The efficacy of venlafaxine prolonged-release capsules as a treatment for social anxiety disorder was established in four double-blind, parallel-group, 12-week, multi-center, placebo-controlled, flexible-dose studies and one double-blind, parallel-group, 6-month, placebo-controlled, fixed/flexible-dose study in adult outpatients. Patients received doses in a range of 75 to 225 mg/day. There was no evidence for any greater effectiveness of the 150 to 225 mg/day group compared to the 75 mg/day group in the 6-month study.



5.2 Pharmacokinetic Properties



Venlafaxine is extensively metabolised, primarily to the active metabolite, O-desmethylvenlafaxine (ODV). Mean ± SD plasma half-lives of venlafaxine and ODV are 5±2 hours and 11±2 hours, respectively. Steady-state concentrations of venlafaxine and ODV are attained within 3 days of oral multiple-dose therapy. Venlafaxine and ODV exhibit linear kinetics over the dose range of 75 mg to 450 mg/day.



Absorption



At least 92% of venlafaxine is absorbed following single oral doses of immediate-release venlafaxine. Absolute bioavailability is 40% to 45% due to presystemic metabolism. After immediate-release venlafaxine administration, the peak plasma concentrations of venlafaxine and ODV occur in 2 and 3 hours, respectively. Following the administration of venlafaxine prolonged-release capsules, peak plasma concentrations of venlafaxine and ODV are attained within 5.5 hours and 9 hours, respectively. When equal daily doses of venlafaxine are administered as either an immediate-release tablet or prolonged-release capsule, the prolonged-release capsule provides a slower rate of absorption, but the same extent of absorption compared with the immediate-release tablet. Food does not affect the bioavailability of venlafaxine and ODV.



Distribution



Venlafaxine and ODV are minimally bound at therapeutic concentrations to human plasma proteins (27% and 30%, respectively). The volume of distribution for venlafaxine at steady-state is 4.4±1.6 L/kg following intravenous administration.



Metabolism



Venlafaxine undergoes extensive hepatic metabolism. In vitro and in vivo studies indicate that venlafaxine is biotransformed to its major active metabolite, ODV, by CYP2D6. In vitro and in vivo studies indicate that venlafaxine is metabolised to a minor, less active metabolite, N-desmethylvenlafaxine, by CYP3A4. In vitro and in vivo studies indicate that venlafaxine is a weak inhibitor of CYP2D6. Venlafaxine did not inhibit CYP1A2, CYP2C9, or CYP3A4.



Elimination



Venlafaxine and its metabolites are excreted primarily through the kidneys. Approximately 87% of a venlafaxine dose is recovered in the urine within 48 hours as either unchanged venlafaxine (5%), unconjugated ODV (29%), conjugated ODV (26%), or other minor inactive metabolites (27%). Mean ± SD plasma steady-state clearances of venlafaxine and ODV are 1.3±0.6 L/h/kg and 0.4±0.2 L/h/kg, respectively.



Special populations



Age and gender



Subject age and gender do not significantly affect the pharmacokinetics of venlafaxine and ODV.



CYP2D6 extensive/poor metabolisers



Plasma concentrations of venlafaxine are higher in CYP2D6 poor metabolisers than extensive metabolisers. Because the total exposure (AUC) of venlafaxine and ODV is similar in poor and extensive metabolisers, there is no need for different venlafaxine dosing regimens for these two groups.



Patients with hepatic impairment



In Child-Pugh A (mildly hepatically impaired) and Child-Pugh B (moderately hepatically impaired) subjects, venlafaxine and ODV half-lives were prolonged compared to normal subjects. The oral clearance of both venlafaxine and ODV was reduced. A large degree of intersubject variability was noted. There are limited data in patients with severe hepatic impairment (see section 4.2).



Patients with renal impairment



In dialysis patients, venlafaxine elimination half-life was prolonged by about 180% and clearance reduced by about 57% compared to normal subjects, while ODV elimination halflife was prolonged by about 142% and clearance reduced by about 56%. Dosage adjustment is necessary in patients with severe renal impairment and in patients that require haemodialysis (see section 4.2).



5.3 Preclinical Safety Data



Studies with venlafaxine in rats and mice revealed no evidence of carcinogenesis. Venlafaxine was not mutagenic in a wide range of in vitro and in vivo tests.



Animal studies regarding reproductive toxicity have found in rats a decrease in pup weight, an increase in stillborn pups, and an increase in pup deaths during the first 5 days of lactation. The cause of these deaths is unknown. These effects occurred at 30 mg/kg/day, 4 times the human daily dose of 375 mg of venlafaxine (on an mg/kg basis). The no-effect dose for these findings was 1.3 times the human dose. The potential risk for humans is unknown.



Reduced fertility was observed in a study in which both male and female rats were exposed to ODV. This exposure was approximately 1 to 2 times that of a human venlafaxine dose of 375 mg/day. The human relevance of this finding is unknown.



6. Pharmaceutical Particulars



6.1 List Of Excipients



150 mg prolonged-release capsules, hard:



Capsule content:



Hypromellose



Ammonio methacrylate copolymer (type B)



Sodium larilsulfate



Magnesium stearate



Coating:



Basic butylated methacrylate copolymer 12.5%



Capsule shell:



Gelatin



Titanium dioxide (E 171)



Erythrosine (E127)



Indigotin I (E 132)



Printing ink:



Shellac



Black iron oxide (E172)



Propylene glycol (E1520)



6.2 Incompatibilities



Not applicable.



6.3 Shelf Life



3 years.



6.4 Special Precautions For Storage



Store below 30°C



6.5 Nature And Contents Of Container



PVC/PE/PVDC/Al blister



150 mg: 10, 28, 30, 56, 98 and 100 capsules



Not all pack sizes may be marketed.



6.6 Special Precautions For Disposal And Other Handling



No special requirements



7. Marketing Authorisation Holder



Goldshield Pharmaceuticals Ltd



NLA Tower, 12-16 Addiscombe Road,



Croydon,



CR0 0XT



8. Marketing Authorisation Number(S)



PL 12762/0455



9. Date Of First Authorisation/Renewal Of The Authorisation



11/06/2008



10. Date Of Revision Of The Text



14/12/10



11 DOSIMETRY


(IF APPLICABLE)



12 INSTRUCTIONS FOR PREPARATION OF RADIOPHARMACEUTICALS


(IF APPLICABLE)





Midrid Capsules 15s





1. Name Of The Medicinal Product



Midrid Capsules



Lloydspharmacy Migraine Relief


2. Qualitative And Quantitative Composition



Paracetamol 325.0mg



Isometheptene mucate 65.0mg



3. Pharmaceutical Form



Capsule



4. Clinical Particulars



4.1 Therapeutic Indications



In the treatment of migraine and other vascular headaches



4.2 Posology And Method Of Administration



For oral administration



Adults: 2 capsules at once, then 1 capsule every hour until relief obtained up to a maximum of 5 capsules within a 12 hour period



Children: Not recommended



4.3 Contraindications



Severe cardiac, hepatic or renal impairment, severe hypertension, glaucoma. Patients on monoamine oxidase inhibitor therapy. Porphyria. Hypersensitivity to paracetamol and/or other constituents.



4.4 Special Warnings And Precautions For Use



Cardiovascular disease, diabetes mellitus, hyperthyroidism. When used in patients with high spinal cord lesions, isometheptene, like other sympathomimetics may cause autonomic dysreflexia.



Care is advised in the administration of this product to patients with renal or hepatic impairment. The hazards of paracetamol overdose are greater in those with non-cirrhotic alcoholic liver disease.



Do not exceed the recommended dose



If symptoms persist, consult your doctor



Keep out of the sight and reach of children



Patient information leaflet warning



Immediate medical advice should be sought in the event of an overdose, even if you feel well, because of the risk of delayed, serious liver damage.



Label warning



Do not take with any other paracetamol-containing products. Immediate medical advice should be sought in the event of an overdose, even if you feel well.



4.5 Interaction With Other Medicinal Products And Other Forms Of Interaction



On theoretical grounds, care should be taken with patients receiving cardiac glycosides, quinidine, anti-hypertensives and tricyclic antidepressants. Alcohol reduces liver capacity to deal with paracetamol. Cholestyramine reduces absorption of paracetamol. Metoclopramide and domperidone accelerate absorption of paracetamol. May interact with chloramphenicol, causing increased plasma levels.



The anticoagulant effect of warfarin and other coumarins may be enhanced by prolonged regular use of paracetamol with increased risk of bleeding; occasional doses have no significant effect.



There is an increased risk of toxicity with bromocriptine and isometheptene.



There is an increased risk of a hypertensive crisis when sympathomimetics are given with MAOIs.



4.6 Pregnancy And Lactation



There is no evidence of the product's safety in human pregnancy nor is there evidence from animal work that it is free from hazard. Avoid in pregnancy and lactation.



4.7 Effects On Ability To Drive And Use Machines



No information



4.8 Undesirable Effects



Transient dizziness may appear in hypersensitive patients. This can usually be eliminated by reducing the dose. Circulatory disturbances may occur.



Adverse effects of paracetamol are rare but hypersensitivity reactions including skin rashes may occur. Anaphylaxis, angioedema, urticaria and very rare cases of fixed drug eruption have been reported. There have been reports of blood dyscrasias including thrombocytopenia, purpura and agranulocytosis, but these were not necessarily causally related to paracetamol.



Blood disorders have also been reported with isometheptene containing products.



4.9 Overdose



Liver damage is possible in adults who have taken 10g or more of paracetamol.



Ingestion of 5g or more of paracetamol may lead to liver damage if the patient has risk factors (see below).



Risk factors



If the patient



a. is on long term treatment with carbamazepine, phenobarbitone, phenytoin, primidone, rifampicin, St John's Wort or other drugs that induce liver enzymes



or



b. regularly consumes ethanol in excess of recommended amounts



or



c. is likely to be glutathione deplete eg eating disorders, cystic fibrosis, HIV infection, starvation, cachexia



Symptoms



Symptoms of paracetamol overdosage in the first 24 hours are pallor, nausea, vomiting, anorexia and abdominal pain. Liver damage may become apparent 12 to 48 hours after ingestion. Abnormalities of glucose metabolism and metabolic acidosis may occur. In severe poisoning, hepatic failure may progress to encephalopathy, haemorrhage, hypoglycaemia, cerebral oedema and death. Acute renal failure with acute tubular necrosis, strongly suggested by loin pain, haematuria and proteinuria, may develop even in the absence of severe liver damage. Cardiac arrhythmias and pancreatitis have been reported.



Management



Immediate treatment is essential in the management of paracetamol overdosage. Despite a lack of significant early symptoms, patients should be referred to hospital urgently for immediate medical attention. Symptoms may be limited to nausea or vomiting and may not reflect the severity of overdose or the risk of organ damage. Management should be in accordance with established treatment guidelines, see BNF overdose section.



Treatment with activated charcoal should be considered if the overdose has been taken within 1 hour. Plasma paracetamol concentration should be measured at 4 hours or later after ingestion (earlier concentrations are unreliable). Treatment with N-acetylcysteine may be used up to 24 hours after ingestion of paracetamol, however, the maximum protective effect is obtained up to 8 hours post-ingestion. The effectiveness of the antidote declines sharply after this time. If required the patient should be given intravenous N-acetylcysteine, in line with the established dosage schedule. If vomiting is not a problem, oral methionine may be a suitable alternative for remote areas, outside hospital. Management of patients who present with serious hepatic dysfunction beyond 24 hr from ingestion should be discussed with the NPIS or a liver unit.



5. Pharmacological Properties



5.1 Pharmacodynamic Properties



Paracetamol is an effective analgesic and antipyretic agent but has only weak anti-inflammatory properties. Its mechanism of action is not fully understood as it is only a weak inhibitor of prostaglandin biosynthesis, but it has been suggested that it is more effective against enzymes in the CNS than those in the periphery. The drug has no effect on the cardiovascular and respiratory systems, and it does not cause gastric irritation or bleeding like salicylates.



5.2 Pharmacokinetic Properties



Isometheptene mucate is rapidly excreted in man. Excretion peaks at 2-6 hours after dosing.



Paracetamol is readily absorbed from the gastrointestinal tract with peak plasma concentrations occurring about 30 minutes to 2 hours after ingestion. It is metabolised in the liver and excreted in the urine mainly as the glucuronide and sulphate conjugates. Less than 5% is excreted as unchanged paracetamol. The elimination half life varies from about 1 to 4 hours. Plasma-protein blinding is negligible at usual therapeutic concentrations but increases with increasing concentrations.



A minor hydroxylated metabolite, which is usually produced in very small amounts by mixed-function oxidases in the liver and which is usually detoxified by conjugation with liver glutathione, may accumulate following paracetamol overdosage and cause liver damage.



5.3 Preclinical Safety Data



There are no other data of relevance to the prescriber which are not included on the SPC



6. Pharmaceutical Particulars



6.1 List Of Excipients



Microcrystalline cellulose



Talc



Colloidal silicon dioxide



Purified water



Capsule shell:



Gelatin



Water



Titanium dioxide



Erythrosine



Quinoline yellow



Indigotine



Printing ink Opacode black S-1-8100HV



6.2 Incompatibilities



Not applicable



6.3 Shelf Life



3 years



6.4 Special Precautions For Storage



Do not store above 25°C



6.5 Nature And Contents Of Container



Strips of 5 or 15 capsules



Blister packs of 5, 10, 15, 20 and 30 capsules



6.6 Special Precautions For Disposal And Other Handling



None



7. Marketing Authorisation Holder



Manx Healthcare Ltd



Taylor Group House



Wedgnock Lane



Warwick



CV34 5YA



United Kingdom



8. Marketing Authorisation Number(S)



PL 14251/0021



9. Date Of First Authorisation/Renewal Of The Authorisation



22 September 2004 / 19 December 2007



10. Date Of Revision Of The Text



May 2010





Dulcobalance





1. Name Of The Medicinal Product



Dulcobalance


2. Qualitative And Quantitative Composition



Each sachet contains 10 g of macrogol 4000.



For a full list of excipients: see section 6:1



3. Pharmaceutical Form



Powder for an oral solution in a sachet.



Almost white powder with an odour and taste of orange-grapefruit.



4. Clinical Particulars



4.1 Therapeutic Indications



Symptomatic treatment of constipation in adults and children aged 8 years and above.



An organic disorder should have been ruled out before initiation of treatment.



Dulcobalance should remain a temporary adjuvant treatment to appropriate lifestyle and dietary management of constipation, with a maximum 3-month treatment course in children. If symptoms persist despite associated dietary measures, an underlying cause should be suspected and treated.



4.2 Posology And Method Of Administration



Oral use



1 to 2 sachets per day, preferably taken as a single dose in the morning. Each sachet should be dissolved in a glass of water just before use.



The effect of Dulcobalance becomes apparent within 24 to 48 hours after its administration.



In children, treatment should not exceed 3 months due to a lack of clinical data for treatment lasting longer than 3 months. Treatment-induced restoration of bowel movements will be maintained by lifestyle and dietary measures.



The daily dose should be adapted according to the clinical effects and may range from one sachet every other day (especially in children) up to 2 sachets a day.



4.3 Contraindications



- severe inflammatory bowel disease (such as ulcerative colitis, Crohn's disease) or toxic megacolon, associated with symptomatic stenosis,



- digestive perforation or risk of digestive perforation



- ileus or suspicion of intestinal obstruction,



- painful abdominal syndromes of indeterminate cause,



- hypersensitivity to macrogol (polyethylene glycol) or to any of the excipients.



4.4 Special Warnings And Precautions For Use



Warnings



The treatment of constipation with any medicinal product is only an adjuvant to a healthy lifestyle and diet, for example:



- increased intake of liquids and dietary fibre,



- appropriate physical activity and rehabilitation of the bowel reflex.



Patients with hereditary problems of fructose intolerance should not take this medicinal product.



In case of diarrhoea, caution should be exercised in patients who are prone to a disturbance of water electrolyte balance (e.g. the elderly, patients with impaired hepatic or renal function or patients taking diuretics) and electrolyte control should be considered.



Precautions for use



Very rare cases of hypersensitivity reactions (rash, urticaria, oedema) have been reported with drugs containing macrogol (polyethylene glycol). Exceptional cases of anaphylactic shock have been reported.



Dulcobalance does not contain a significant quantity of sugar or polyol and can be prescribed to diabetic patients or patients on a galactose-free diet.



4.5 Interaction With Other Medicinal Products And Other Forms Of Interaction



Not applicable.



4.6 Pregnancy And Lactation



Pregnancy



Macrogol 4000 was not teratogenic in rats or rabbits



There are no adequate data from use of Dulcobalance in pregnant women



Therefore caution should be exercised when prescribing Dulcobalance to pregnant women.



Lactation



There are no data on the excretion of macrogol 4000 in breast milk. As macrogol 4000 is not significantly absorbed, Dulcobalance may be administered during lactation.



4.7 Effects On Ability To Drive And Use Machines



Not applicable



4.8 Undesirable Effects



Adults:



Undesirable effects reported during clinical trial involving almost 600 patients with the following frequencies have always been minor and transitory and have mainly concerned the gastrointestinal system:



- common (



- uncommon (> 1/1000, <1/100): vomiting, and the more common consequence of diarrhoea: urgency to defaecate and faecal incontinence.



Additional information from post-marketing surveillance included:



- very rare (< 1/10000) cases of hypersensitivity reactions: pruritus, urticaria, rash, face oedema, Quincke oedema and an isolated case of anaphylactic shock,



- unknown frequency of diarrhoea leading to electrolyte disorders (hyponatremia, hypokalaemia) and/or dehydration, especially in elderly patients.



Excessive doses may cause diarrhoea, which generally disappears when the dosage is reduced or treatment temporarily interrupted



Children:



Undesirable effects reported during clinical trials involving 147 children aged from 6 months to 15 years with the following frequencies. These effects have always been minor and transitory and have concerned the gastrointestinal system.



Gastrointestinal disorders:



- common (> 1/100, <1/10): diarrhoea and abdominal pain,



- uncommon (> 1/1000, <1/100): bloating, vomiting and nausea.



There is no additional information from the post-marketing surveillance: hypersensitivity reactions have not been reported in children so far. Nevertheless, such reactions may occur as reported in adults.



Excessive doses may cause diarrhoea which generally disappears when the dosage is reduced or treatment temporarily interrupted. Diarrhoea may cause perianal soreness.



4.9 Overdose



Overdose leads to diarrhoea which disappears when treatment is temporarily interrupted or the dosage is reduced.



Excessive fluid loss by diarrhoea or vomiting may require correction of electrolyte disturbances.



Cases of aspiration have been reported when extensive volumes of polyethylene glycol and electrolytes were administered with nasogastric tube. Neurologically impaired children who have oromotor dysfunction are particularly at risk of aspiration.



5. Pharmacological Properties



5.1 Pharmacodynamic Properties



Osmotically acting laxatives



ATC code: A06AD15



High molecular weight (4000) macrogols are long linear polymers which retain water molecules by means of hydrogen bonds. When administered by the oral route, they lead to an increase in volume of intestinal fluids.



The volume of unabsorbed intestinal fluid accounts for the laxative properties of the solution.



5.2 Pharmacokinetic Properties



The pharmacokinetic data confirm that macrogol 4000 undergoes neither gastrointestinal resorption nor biotransformation following oral ingestion.



5.3 Preclinical Safety Data



Toxicological studies in different species of animals did not reveal any signs of systemic or local gastrointestinal toxicity of macrogol 4000. Macrogol 4000 had no teratogenic, mutagenic, nor carcinogenic effect. Potential drug interaction studies performed in rats on some NSAIDs, anticoagulants, gastric antisecretory agents, or on a hypoglycaemic sulfamide showed that Dulcobalance did not interfere with gastrointestinal absorption of these compounds.



6. Pharmaceutical Particulars



6.1 List Of Excipients



Saccharin sodium (E954), orange-grapefruit flavour**



** Composition of the orange-grapefruit flavour:



Orange and grapefruit oils, concentrated orange juice, citral, acetaldehyde, linalol, ethyl butyrate, alpha terpineol, octanal, beta gamma hexenol, maltodextrine, gum arabic, sorbitol.



6.2 Incompatibilities



Not applicable



6.3 Shelf Life



3 years



6.4 Special Precautions For Storage



No special precaution for storage



6.5 Nature And Contents Of Container



(Paper / Aluminium / PE) sachet.



Single dose sachets presented in pack sizes of 10, 20, 50 and 100 sachets



Not all pack sizes may be marketed



6.6 Special Precautions For Disposal And Other Handling



No special requirements



7. Marketing Authorisation Holder



Boehringer Ingelheim Limited



Consumer Healthcare



Ellesfield Avenue



Bracknell



Berkshire



RG12 8YS



United Kingdom



8. Marketing Authorisation Number(S)



PL 00015/0318



9. Date Of First Authorisation/Renewal Of The Authorisation



11 July 2008



10. Date Of Revision Of The Text



May 2009