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Warfarin - Indications, Dosage, Side Effects and Precautions

Written & Compiled by Anushta Chandrapalan, M.Sc  | Medically Reviewed by The Medindia Medical Review Team
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Information about Warfarin

Generic Name : Warfarin
Pronunciation : war' far in
Latest prescription information about Warfarin. Learn how to pronounce the drug's name, its indications, dosage, how to take, when to take, when not to take, side effects, special precautions, warnings and its storage instructions . Also listed are the International and Indian trade name(s) of the drug and its price list.
ICD Code : Y44.2 | Therapeutic Classification : Anticoagulants / Antithrombotics

Trade Names/Brand Names of Warfarin

India : 

International : 

Coumadin, Jantoven

Why is Warfarin Prescribed? (Indications)

This medication is an anticoagulant, prescribed for deep venous thrombosis and pulmonary embolism. It reduces the formation of blood clots.

When should Warfarin not be taken? (Contraindications)

Contraindicated in patients with severe bleeding problems, spontaneous abortion, ulcer, recently underwent a surgery, pregnancy and hypersensitivity.

What is the dosage of Warfarin?

Adult: PO/IV- Initial: 5 mg/day. Rapid anti-coagulation: Initial: 10 mg/day for 2 days. Maintenance: 2-10 mg/day.

How should Warfarin be taken?

It comes as a tablet to take by mouth, with or without food.
It also comes as a solution for injection to be administered by a healthcare provider.

What are the warnings and precautions for Warfarin?

• Caution should be exercised in patients with history of liver, kidney, or thyroid problems, yellowing of the skin or eyes, mental problems, high cholesterol, joint inflammation, sugar, cancer, stomach or bowel problems, any allergy, who are taking other medications, during pregnancy and breastfeeding.

• Avoid alcohol consumption.

• Avoid cranberry juice consumption while taking this medication.

• Avoid becoming overheated.

What are the side effects of Warfarin?

   Most Common : Tingling, headache, chest, abdomen, joint, muscle pain, dizziness, shortness of breath, difficulty in breathing or swallowing, unexplained swelling, weakness, low blood pressure and shock.
   Hypersensitivity : Hives, itching, fever, rash and hair loss.
   Gastrointestinal : Nausea, vomiting, diarrhea and abdominal pain.
   Central Nervous System : Fatigue, tiredness, uneasiness, weakness, headache, dizziness, loss of consciousness, fainting, coma and taste perversion.

What are the other precautions for Warfarin?

Avoid excess dosage.

What are the storage conditions for Warfarin?

Store it at room temperature and away from light.
Last Updated : Feb 2018

Warfarin: What You Need to Know About The Anticoagulant Drug

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Fixie, United States

Today when I went for my INR only the nurse was available and it was very high...5.6. That's scares me. I am having so many aches and pains and bruises and wonder if that is part of it.

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