Warfin 5 Tablet
Warfarin Sodium
5mg
Lomus Pharmaceutical Pvt. Ltd.
| Pack size | 100's |
|---|---|
| Dispensing mode | |
| Source | |
| Agent | |
| Retail Price | 3.98 NPR |
Available as:
Indications
Warfin 5 Tablet is used for:
Venous thromboembolism, Stroke prevention, Deep vein thrombosis
Adult Dose
Oral
Treatment and prophylaxis of venous thromboembolism, Stroke & Thromboembolism, Post-Myocardial Infarction
Adult: Initially, 2-5 mg qDay for 2 days, OR 10 mg daily for 2 days in healthy individuals
Initiate warfarin on day 1 or 2 of LMWH or unfractionated heparin therapy and overlap until desired INR, THEN discontinue heparin
Check INR after 2 days and adjust dose according to results
Usual maintenance dose: 2-10 mg daily.
Elderly: Anticoagulation
Lower doses required to produce therapeutic level of anticoagulation
Initial: <5 mg PO qDay
Maintenance: 2-5 mg PO qDay
Hepatic impairment: Severe: Avoid.
Child Dose
Thrombosis
Prevention/treatment: If baseline INR is 1.0-1.3, administer loading dose of 0.1-0.2 mg/kg PO qDay × 1 day; check INR on days 2-4 and adjust daily dose to maintain INR between 2.0 and 3.0 (unless valve replacement indicates a higher range)
Use 0.1 mg/kg to initiate therapy with liver impairment or in patients who have had a Fontan procedure
Typical maintenance dose: 0.09-0.33 mg/kg/day, with infants <12 months old often requiring doses at high end of range
Renal Dose
Administration
May be taken with or without food.
Contra Indications
Patient w/ haemorrhagic tendencies or blood dyscrasias, recent or contemplated surgery of the CNS or eye, those undergoing traumatic surgery resulting in large open surfaces, overt bleeding or active ulceration involving the GI, genitourinary or resp tract, cerebrovascular haemorrhage, cerebral aneurysms, dissecting aorta, pericarditis and pericardial effusions, bacterial endocarditis, threatened abortion, eclampsia, pre-eclampsia, malignant HTN. Unsupervised patients w/ conditions associated w/ potential high level of non-compliance, spinal puncture and other diagnostic or therapeutic procedures w/ potential for uncontrolled bleeding, major regional or lumbar block anaesth. Concomitant use w/ fibrinolytic drugs (e.g. streptokinase, alteplase). Pregnancy.
Precautions
Any condition where added risk of haemorrhage, necrosis and/or gangrene is present. Patient w/ heparin-induced thrombocytopenia, infectious diseases or disturbances of intestinal flora (e.g. sprue), indwelling catheters, moderate to severe HTN, vit C or K deficiency, known or suspected deficiency in protein C-mediated anticoagulant response, polycythemia vera, vasculitis, DM. Moderate to severe hepatic or renal impairment. Elderly. Lactation.
Patient Counselling Eat a balanced diet w/ a constant amount of vit K. Avoid ingestion of large quantities of certain foods that contain a large amount of vit K (e.g. leafy green vegetables, certain vegetable oils), drastic changes in diet and activities or sports that could cause traumatic injury. Monitoring Parameters Monitor prothrombin time, haematocrit, INR (frequency varies depending on INR stability); may consider genotyping of CYP2C9 and VKORC1 prior to initiation of therapy, if available.
Lactation: Not excreted in breast milk as reported in limited published study (AAP Committee states compatible with nursing); because of potential for serious adverse reactions, including bleeding in breastfed infant, consider developmental and health benefits of breastfeeding along with mother’s clinical need for therapy; monitor breastfeeding infants for bruising or bleeding
Pregnancy-Lactation
Interactions
Cholestatic hepatitis may occur when taken concomitantly w/ ticlopidine. Increased risk of bleeding w/ other anticoagulants (e.g. argatroban, dabigatran, heparin), antiplatelet agents (e.g. aspirin, cilostazol, clopidogrel), NSAIDs (e.g. celecoxib, diclofenac, ibuprofen), serotonin reuptake inhibitors (e.g. citalopram, paroxetine, venlafaxine). Increased INR w/ CYP2C9 (e.g. amiodarone, capecitabine, cotrimoxazole), CYP1A2 (e.g. aciclovir, allopurinol, ciprofloxacin) and CYP3A4 (e.g. alprazolam, amlodipine, atorvastatin) inhibitors. Decreased INR w/ CYP2C9, CYP1A2 and CYP3A4 inducers.
Potentially Fatal: Increased risk of bleeding w/ fibrinolytic drugs (e.g. streptokinase and alteplase).
Adverse Effects
Side effects of Warfarin Sodium :
Hemorrhage is the principal adverse effect of oral anticoagulants. Jaundice, hepatic dysfunction, vasculitis, pancreatitis, nausea, vomiting, diarrhoea, taste perversion, abdominal pain, flatulence, bloating, rash, purpura, erythematous swollen skin patches leading to ecchymosis, pruritus, alopecia, purple discolouration of toes due to cholesterol embolisation, tracheal or tracheobronchial calcification, fever, chills. Unexplained drop in haematocrit, decreased Hb. Rarely, hypersensitivity reactions.
Potentially Fatal: Haemorrhage from almost any organ of the body w/ the consequent effects of haematomas as well as anaemia, tissue necrosis and/or gangrene of skin or other tissues w/ SC infarction.
Mechanism of Action
Warfarin inhibits synthesis of vit K-dependent coagulation factors VII, IX, X and II and anticoagulant protein C and its cofactor protein S. No effects on established thrombus but further extension of the clot can be prevented. Secondary embolic phenomena are avoided.
Note
Warfin 5 5mg Tablet manufactured by Lomus Pharmaceutical Pvt. Ltd.. Its generic name is Warfarin Sodium. Warfin 5 is availble in Nepal.
Farmaco Nepal drug index information on Warfin 5 Tablet is not intended for diagnosis, medical advice or treatment; neither intended to be a substitute for the exercise of professional judgment.