Not medical advice. This information is for educational purposes only. Always consult a qualified doctor or pharmacist before taking any medicine. Warfarin requires a valid prescription.
Warfarin
Generic Name: WARFARIN SODIUM
Warfarin sodium tablets, USP contain warfarin sodium, an anticoagulant that acts by inhibiting vitamin K-dependent coagulation factors.
Data last updated: 30 March 2026 · Source: openFDA.gov, DailyMed (NLM/NIH)
Common Brand Names in India:
How Does It Work?
Vitamin K is an essential cofactor for the post ribosomal synthesis of the vitamin K-dependent clotting factors.
Dosage & Administration
- Individualize dosing regimen for each patient, and adjust based on INR response. ( 2.1 , 2.2 ) Knowledge of genotype can inform initial dose selection. Monitoring: Obtain daily INR determinations upon initiation until stable in the therapeutic range.
- Adjust the dose based on the patient’s INR and the condition being treated.
Side Effects
Common Side Effects
Serious Side Effects (seek immediate medical attention)
Warnings & Precautions
- Tissue necrosis: Necrosis or gangrene of skin or other tissues can occur, with severe cases requiring debridement or amputation.
- Warfarin sodium may be considered after platelet count has normalized. Pregnant women with mechanical heart valves: Warfarin sodium may cause fetal harm; however, the benefits may outweigh the risks. 5.1 Hemorrhage Warfarin sodium can cause major or fatal bleeding.
- Those at high risk of bleeding may benefit from more frequent INR monitoring, careful dose adjustment to desired INR, and a shortest duration of therapy appropriate for the clinical condition.
- However, maintenance of INR in the therapeutic range does not eliminate the risk of bleeding.
Who Should NOT Take This?
- Warfarin sodium can cause fetal harm when administered to a pregnant woman.
- Warfarin sodium exposure during pregnancy causes a recognized pattern of major congenital malformations (warfarin embryopathy and fetotoxicity), fatal fetal hemorrhage, and an increased risk of spontaneous abortion and fetal mortality.
- If warfarin sodium is used during pregnancy or if the patient becomes pregnant while taking this drug, the patient should be apprised of the potential hazard to a fetus [see Use in Specific Populations ] .
Drug Interactions
Warfarin may interact with the following medicines. Always inform your doctor about all medications you are taking.
Storage Instructions
Store at room temperature, away from moisture and heat.
Speak to a cardiologist on Zospital
Consult a cardiologist on Zospital before starting Warfarin. Verified Indian specialists available for in-clinic and online consultations.
Other Cardiovascular Medicines
Sources: openFDA.gov · dailymed.nlm.nih.gov · nlm.nih.gov (RxNorm). Information is for educational purposes only. Consult a doctor before use.
FAQS
Warfarin – Frequently Asked Questions
Common questions about Warfarin, its uses, dosage and safety.
Warfarin is sold in India under brand names such as Coumadin, Sofarin, Warf, Marevan, Jantoven, Warfarin Sodium. You can also find it on online pharmacies like 1mg, Pharmeasy and Apollo Pharmacy.
Warfarin is a prescription-only (Schedule H) medicine in India. You will need a valid prescription from a registered MBBS / MD doctor to purchase it from a licensed pharmacy.
Common side effects of Warfarin can include: Nausea, Vomiting, Diarrhea, Rash, Abdominal pain. Less common but serious side effects can include: Serious, Fatal, Anaphylactic. Stop the medicine and contact your doctor immediately if any of these appear.
Vitamin K is an essential cofactor for the post ribosomal synthesis of the vitamin K-dependent clotting factors.
Warfarin can interact with: General, Information, Warfarin, Serotonin, Botanical, Herbal. Tell your doctor about every medicine, supplement and herbal product you take — including ayurvedic and homeopathy preparations — before starting Warfarin.
Indian guidelines often recommend lower starting doses of Warfarin for patients above 60-65, since kidney and liver function decline with age. A doctor should review the dose, especially if the patient already takes BP, sugar or heart medicines.
Pregnancy safety of Warfarin depends on the trimester and individual case. Indian gynaecologists usually avoid Category C/D drugs unless benefit clearly outweighs risk. Speak to your obstetrician before taking Warfarin during pregnancy or while planning conception.
Prices in India typically range from ₹30 – ₹250 per strip of 10 tablets depending on brand. Generic versions tend to cost 30-60% less than branded ones, and Jan Aushadhi outlets often stock the lowest-priced equivalents. Check 1mg or Pharmeasy for live MRP.
If you remember within a few hours of the missed dose, take it. If it is nearly time for the next dose, skip the missed one — never double up. Frequent missed doses reduce Warfarin's effectiveness, so consider setting a reminder or speaking to your doctor about a simpler schedule.
You can book an in-person or online consultation with a verified Indian specialist on Zospital — visit the doctor directory at https://zospital.com/doctor to find one near you.
Medical Disclaimer
The content provided on Zospital is for general informational and educational purposes only. It is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified healthcare provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read on this website. If you think you may have a medical emergency, call your doctor or emergency services immediately.