Warfarin Tablets
Formulated for thromboembolism to mitigate clotting risks.
Strengths: 1 · 2 · 5mg
Where to Check Availability
Medicine details
- Alternative names
Marevan; Warfant
- Therapeutic class
Vitamin K Antagonist
- Pharmacological class
Coumarin Anticoagulant
- Minor side effects
bruising; minor bleeding
- Moderate side effects
epistaxis; haematuria; alopecia
- Dosage forms
Tablet
- Administration route
Oral use
- Patient summary
Formulated for thromboembolism to mitigate clotting risks.
- Prescription status
POM
- Manufacturer
Teva UK
- Onset Time
48–72 hours
- Duration
2–5 days
- Storage instructions
Store below 25°C in a dry place.
- Drug interactions
Alcohol; Cranberry juice; NSAIDs; Antibiotics
- Age restrictions
Use with caution in elderly patients.
Contraindications
pregnancy; severe hypertension; hemorrhagic conditions; severe hepatic impairment
Precautions and warnings
regular blood monitoring required; avoid rapid dietary changes in vitamin k intake; inform your doctor before any planned surgery
Serious side effects
major haemorrhage — requires immediate medical attention; calciphylaxis — requires immediate medical attention
Mechanism of action
Warfarin acts as a vitamin K antagonist by inhibiting the enzyme vitamin K epoxide reductase. This impairs the synthesis of vitamin K-dependent clotting factors II, VII, IX, and X, effectively prolonging the time required for blood to clot.
Pregnancy and breastfeeding
Pregnancy: Contraindicated as it may cause congenital malformations. Breastfeeding: Generally considered safe.
Warfarin Tablets
Formulated for thromboembolism to mitigate clotting risks.
Editorial Notes
- Active ingredient(s): Warfarin
- Listed indication(s): Atrial Fibrillation, Thromboembolism, Deep Vein Thrombosis
Usually available as
- 360 tablets - 1 mg1316-1-mg-15725
- 360 tablets - 2 mg1316-2-mg-15731
- 180 tablets - 5 mg1316-5-mg-15738