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Generic Name

  • Warfarin.

Brand Names

  • Coumadin, Jantoven.

General Information

Jantoven is an anticoagulant which acts by inhibiting vitamin K-dependent coagulation factors. Warfarin is used to prevent and treat harmful blood clots. This medication helps to keep blood flowing smoothly in your body by decreasing the amount of clotting proteins in the blood. Warfarin is sometimes commonly referred to as a "blood thinner," but its more correct term is "anticoagulant." Warfarin can cause birth defects or bleeding in an unborn child. Women of childbearing age should use effective contraception while receiving warfarin therapy. If a woman becomes pregnant while taking warfarin, she should discuss the potential risks and her options with her health care professional. Avoid eating cranberries or drinking cranberry juice while being treated with this medication unless your doctor instructs you otherwise. Cranberry juice can increase the effect of this medication.

Jantoven Dosage

  • The dosage is based on your medical condition and response to therapy.
  • Take this medication by mouth usually once a day, or as directed by your doctor.
  • Do not increase the dose, take it more frequently, or stop using it unless directed by your doctor.

Side Effects of Jantoven

  • Loss of appetite.
  • Fast or irregular heartbeat.
  • Nausea and vomiting.
  • Unusual swelling or sudden weight gain.
  • Yellowing of skin or eyes.
  • Fever or chills.
  • Dizziness or lightheadedness.

Warnings and precautions before taking Jantoven

  • Before taking warfarin, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies.
  • Do not take warfarin more often than directed.
  • Alcohol can affect the way warfarin works. Ask your prescriber or health care professional how much, if any, alcohol you may consume.
  • Caution is advised when using this drug in the elderly because they may be more sensitive to its effects.
  • This medication can cause heavy bleeding. Be extra careful to avoid injuries (e.g., avoid contact sports). Use an electric razor when shaving and a soft toothbrush when brushing your teeth.
  • Do not take any over-the-counter medicines without first talking to your prescriber or health care professional. Do not take any aspirin or aspirin-containing products.


  • If overdose is suspected, contact your local poison control center or emergency room immediately.
  • Symptoms of overdose may include unusual or prolonged bleeding, dark urine or black stools.
  • US residents can call the US national poison hotline at 1-800-222-1222.



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