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Drug Guide    W   Warfarin

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   Warfarin

Warfarin
(injection) (injectable)


Helps to prevent new blood clots from forming, and helps to keep existing blood clots from getting worse. This medicine is a blood thinner (anticoagulant).

ALTERNATE NAMES

Coumadin

 
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Overview Photos How To Use Side Effects Precautions Missed Dose Drug Interactions

Warfarin
Coumadin
Uses
Helps to prevent new blood clots from forming, and helps to keep existing blood clots from getting worse. This medicine is a blood thinner (anticoagulant).



How To Use
  • APPEARANCE: Injectable. A nurse or other trained health professional will give you this medicine.This medicine may be given as a shot into a vein.

Side Effects
  • Call your doctor right away if you notice any of these side effects: Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing. Numbness, tingling, or weakness anywhere in your body, or problems with movement, swallowing, or speech. Dizziness, lightheadedness.
  • or trouble thinking clearly. Purple discoloration of your toes or feet, or new pain in a leg, foot, or your toes. Skin changes or rash, or yellowing of your skin or the whites of your eyes. Signs of illness or infection, such as fever, chills, sore throat, cough. Sudden or severe headache, or new pain in your abdomen (belly), flank (sides), or back. Swelling in your hands, ankles, or feet. Unusual bleeding or bruising.
  • This includes bleeding from your gums, coughing up blood, or stools that are bloody, dark, or tarry.
  • Also call for heavy menstrual bleeding, heavy nosebleeds, or bleeding from cuts or wounds that does not stop after holding direct pressure for 10 minutes. Urine that is red, pink, or dark, trouble urinating, or a decrease in how much or how often you urinate.

Precautions
  • You should not use this medicine if you are allergic to warfarin, or if you are pregnant.
  • You should not use this medicine if you have certain heart problems, or if you have a condition that may cause uncontrolled bleeding (such as blood clotting problems or a stomach ulcer).
  • You should not use this medicine if you have recently had surgery or certain types of injury (trauma).
  • Drug: General, Warn, Stop before surgery Make sure any doctor or dentist who treats you knows that you are using this medicine.
  • You may need to stop using this medicine several days before having surgery or medical tests.

Missed Dose
  • This medicine needs to be given on a fixed schedule.
  • If you miss a dose, call your doctor or pharmacist for instructions.

Drug Interactions
  • Using this medicine while you are pregnant can harm your unborn baby.
  • Use an effective form of birth control to keep from getting pregnant.
  • If you think you have become pregnant while using the medicine, tell your doctor right away. Make sure your doctor knows if you are breast feeding, or if you have a stomach ulcer, heart problems, liver disease, kidney disease, or high blood pressure.
  • Tell your doctor if you have had any recent illnesses or infections.
  • Make sure your doctor knows if you have a history of blood or circulation problems, diabetes, or any other medical problems. Tell your doctor if you are using medicine for your blood sugar, such as chlorpropamide (Diabinese®) or tolbutamide.
  • Also tell your doctor if you are using an anticonvulsant such as phenytoin (Dilantin®) or phenobarbital.
  • Your doctor may need to change your dosage of these medicines while you are on warfarin. Your doctor will need to check your blood at regular visits while you are using this medicine.
  • Be sure to keep all appointments. You may bleed and bruise more easily while you are using this medicine.
  • Stay away from rough sports or other situations where you could be bruised, cut, or injured.
  • Brush and floss your teeth gently.
  • Be careful when using sharp objects, including razors and fingernail clippers. Carry an ID card or wear a medical alert bracelet so that during an emergency, health caregivers will know that you are using warfarin.

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CONDITIONS OF USE: The information in this database is intended to supplement, not substitute for, the expertise and judgement of healthcare professionals. The information is not intended to cover all possible uses, directions, precautions, drug interactions or adverse effects, nor should it be construed to indicate that use of a particular drug is safe, appropriate or effective for you or anyone else. A healthcare professional should be consulted before taking any drug, changing any diet or commencing or discontinuing any course of treatment.

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