Country: South Africa
Language: English
Source: South African Health Products Regulatory Authority (SAHPRA)
Lennon
LENNON - WARFARIN 5 mg TABLETS D702 SCHEDULING STATUS: S4 PROPRIETARY NAME (and dosage form): LENNON - WARFARIN 5 mg TABLETS [Ed. NB. product name change to ASPEN WARFARIN - Dec 2010] COMPOSITION: Each tablet contains Warfarin Sodium Clathrate equivalent to 5 mg Warfarin Sodium. PHARMACOLOGICAL CLASSIFICATION: A 8.2 Anticoagulants PHARMACOLOGICAL ACTION: Warfarin is a coumarin-type anticoagulant and acts by depressing synthesis of Vitamin-K dependent coagulation factors in the liver. The resultant in vivo effect is a sequential depression of Factors VII, IX, X and II. After oral administration, absorption is essentially complete and maximal plasma concentrations are reached in 2 to 8 hours. Approximately 99% is bound to albumin in the plasma. The half-life ranges from 20 to 60 hours with a mean of 40 hours. The duration of action is 2 to 5 days. Food in the gastrointestinal tract can decrease the rate of absorption. Warfarin is transformed to inactive metabolites by the liver and kidneys and these are excreted in the urine and stool. INDICATIONS: Prevention and management of deep venous thrombosis and pulmonary embolism. Prevention of thromboembolism in:— artrial fibrillation prosthetic heart valves post myocardial infarction In the treatment of transient ischaemic attacks. CONTRA-INDICATIONS: Should not be used in patients with: Haemorrhagic states Peptic ulcers or other gastrointestinal disease involving bleeding Conditions involving bleeding from respiratory or genito-urinary tract Severe wounds (including surgical) Infective endocarditis Impaired liver function Impaired kidney function Hypertension Cerebrovascular haemorrhage Aneurysm - cerebral, aortic Pericarditis, pericardial effusion Neuro- or ophthalmic surgery - recent or contemplated Surgery involving large exposed raw surfaces Poly Read the complete document