Warfarin Tablet: Uses, Dosage & Side Effects in Pakistan

Warfarin Tablet Uses, Dosage, Side Effects & Price in Pakistan

1. Quick Info (Mukhtasir Maloomat)

2. What is Warfarin Tablet? (Warfarin Tablet kya hai)

Warfarin Tablet (Warf / Coumadin) is used in Pakistan for blood clotting disorders. It belongs to the Vitamin K Antagonist (VKA) Anticoagulant class, with Warfarin as the active ingredient. Warfarin inhibits the Vitamin K epoxide reductase (VKOR) enzyme, blocking the activation of clotting factors II, VII, IX, and X — this keeps the blood thin and prevents harmful clots from forming. The full effect takes 2–3 days because the existing clotting factors must first be depleted. The dose is always adjusted by the doctor based on the INR blood test result — NEVER self-adjust the dose.

3. Uses (Fayde / Kis kaam aati hai)

• Deep Vein Thrombosis (DVT) treatment and prevention
• Pulmonary Embolism (PE) treatment and prevention
• Atrial Fibrillation — stroke prevention
• Mechanical heart valve anticoagulation (lifelong)
• Venous thromboembolism prevention post-surgery
• Recurrent thromboembolism prevention

4. Who May Use It (Kis ko leni chahiye)

A healthcare professional should confirm that the indication, age and exact formulation match the patient’s needs. An ingredient match alone does not make another brand or formulation interchangeable.

5. When Not to Use (Kab nahi leni chahiye)

• Regular INR tests and an individual anticoagulation plan are essential.
• Warfarin can harm a pregnancy; contact the anticoagulation/pregnancy team promptly. Certain mechanical-valve cases require a specialist plan. Do not stop or switch anticoagulants yourself.
• Significant bleeding, head injury or sudden severe headache requires emergency assessment.
• Do not double a missed dose; follow the anticoagulation service’s instructions.
• Keep vitamin K intake reasonably consistent and check new medicines or supplements.

6. Dosage (Kitni leni hai)

Adult guidance

As prescribed by doctor only — dose adjusted based on regular INR blood test; NEVER self-adjust

Child guidance

As prescribed by doctor — specialist guidance required

Dose limits

Use the limit specified for your exact product and individual prescription. A strength printed on a pack is not automatically a recommended dose.

7. How to Use (Kaise leni hai)

Check the medicine name, strength and instructions before each course. Do not share a prescription or change its dose, duration or formulation without professional advice.

8. Timing (Kab leni chahiye)

Check the local leaflet or ask a pharmacist about food timing for this exact formulation; do not infer it from another medicine.

9. Missed Dose (Dose chhoot jaye)

Follow the exact leaflet or contact a pharmacist for missed-dose instructions. Do not double a dose or change a tapering or monitored treatment plan yourself.

10. Warnings (Ihtiyat)

• Regular INR tests and an individual anticoagulation plan are essential.
• Warfarin can harm a pregnancy; contact the anticoagulation/pregnancy team promptly. Certain mechanical-valve cases require a specialist plan. Do not stop or switch anticoagulants yourself.
• Significant bleeding, head injury or sudden severe headache requires emergency assessment.
• Do not double a missed dose; follow the anticoagulation service’s instructions.
• Keep vitamin K intake reasonably consistent and check new medicines or supplements.

11. Precautions (Ahm ehtiyaat)

Check allergies, pregnancy or breastfeeding, kidney and liver conditions, and all other medicines with the prescriber or pharmacist. Store according to the local pack and keep out of reach of children. Below 30°C — away from moisture and direct light

12. Side Effects (Nuksanat)

Reported effects

• Bleeding — bruising, nosebleed, prolonged wound bleeding, menorrhagia
• Nausea (mild)
• Alopecia — reversible hair loss

Serious effects and warning symptoms

• Intracranial haemorrhage — LIFE-THREATENING
• Major GI haemorrhage (blood in stool/vomit)
• Warfarin-induced skin necrosis (first days of therapy — protein C deficiency)
• Purple toe syndrome
• Osteoporosis (long-term use)
• Teratogenicity — embryopathy if taken in pregnancy

These lists do not establish the frequency of an effect or prove that a new symptom is caused by this medicine. Persistent or worsening symptoms need assessment.

13. Interactions (Dawaon ke sath reaction)

Amiodarone (MAJOR — increases INR); fluconazole/metronidazole (increase INR — CYP2C9 inhibition); aspirin/NSAIDs (additive bleeding); ciprofloxacin/clarithromycin (increase INR); rifampicin (MAJOR — decreases INR, CYP2C9 inducer); carbamazepine/phenytoin (decrease INR); St. John's Wort (decreases INR); ginkgo/garlic/ginger supplements (increase bleeding); vitamin K supplements (decrease INR); high-dose paracetamol (increases INR); clopidogrel (additive platelet inhibition)

14. When to Get Help (Kab doctor se milein)

Seek emergency help for difficulty breathing, swelling of the face or throat, collapse, severe bleeding or suspected overdose. For the medicine-specific warning symptoms above, contact a clinician promptly. Bring the pack and a list of medicines.

15. Alternatives (Dusri dawaein)

Ask a pharmacist to compare the exact ingredients, strength, route and release type. A generic name alone does not prove dose equivalence. Do not substitute a combination product for a single-ingredient treatment.

16. Price in Pakistan (Price kitni hai)

A current price matched to the local strength and pack size has not been verified. Confirm the printed price, pack and expiry with a licensed pharmacy.

17. FAQs (Aksar poochay jane walay sawalat)

Q: Warfarin Tablet kis kaam aati hai?

A: Warfarin Tablet contains Warfarin. Deep Vein Thrombosis (DVT) treatment and prevention; Pulmonary Embolism (PE) treatment and prevention. The diagnosis and exact product determine suitability.

Q: Dose kaise confirm karein?

A: As prescribed by doctor only — dose adjusted based on regular INR blood test; NEVER self-adjust

Q: Bachon ke liye dose kya hai?

A: As prescribed by doctor — specialist guidance required

Q: Pakistan mein price kitni hai?

A: A current price matched to the local strength and pack size has not been verified. Confirm the printed price, pack and expiry with a licensed pharmacy.

Q: Nuksanat hon to kya karein?

A: Reported effects include Bleeding — bruising, nosebleed, prolonged wound bleeding, menorrhagia; Nausea (mild); Alopecia — reversible hair loss. Seek medical help for Intracranial haemorrhage — LIFE-THREATENING; Major GI haemorrhage (blood in stool/vomit). A symptom list does not predict how often an effect occurs.

18. Editorial Information (Medical jaiza)

Compiled by the PakVita Editorial Team · AI-assisted drafting with editorial review · Sourced from DRAP, WHO, BNF · Last updated: 2026-10-15

This correction adds ingredient-specific sources and separates verified facts from unverified local pack details. The recorded medical-review date is unchanged; this editorial correction is not a new clinician review. Foreign labels inform ingredient safety and do not establish Pakistani registration or every local pack’s instructions.

19. Disclaimer (Zaroori tanbeeh)

Educational information only. Confirm the diagnosis, local leaflet and individual prescription with a qualified clinician or pharmacist before starting, stopping or changing treatment.