WARFARIN (WAR far in) is an anticoagulant. It is used to treat or prevent clots in the veins, arteries, lungs, or heart.
What should I tell my health care provider before I take this medicine?
They need to know if you have any of these conditions:
high blood pressure
history of bleeding in the gastrointestinal tract
history of stroke or other brain injury or disease
kidney or liver disease
protein C deficiency
protein S deficiency
psychosis or dementia
recent injury, recent or planned surgery or procedure
an unusual or allergic reaction to warfarin, other medicines, foods, dyes, or preservatives
pregnant or trying to get pregnant
How should I use this medicine?
Take this medicine by mouth with a glass of water. Follow the directions on the prescription label. You can take this medicine with or without food. Take your medicine at the same time each day. Do not take it more often than directed. Do not stop taking except on the advice of your doctor or health care professional.
A special MedGuide will be given to you by the pharmacist with each prescription and refill. Be sure to read this information carefully each time.
Talk to your pediatrician regarding the use of this medicine in children. Special care may be needed.
What if I miss a dose?
It is important not to miss a dose. If you miss a dose, call your healthcare provider. Take the dose as soon as possible on the same day. If it is almost time for your next dose, take only that dose. Do not take double or extra doses to make up for a missed dose.
What may interact with this medicine?
Do not take this medicine with any of the following medications:
agents that prevent or dissolve blood clots
aspirin or other salicylates
St. John's Wort
red yeast rice
This medicine may also interact with the following medications:
agents that lower cholesterol
antibiotics or medicines for treating bacterial, fungal or viral infections
barbiturate medicines for inducing sleep or treating seizures
certain medicines for diabetes
certain medicines for heart rhythm problems
certain medicines for high blood pressure
female hormones, including contraceptive or birth control pills
herbal or dietary products like cranberry, garlic, ginkgo, ginseng, green tea, or kava kava
influenza virus vaccine
medicines for mental depression or psychosis
medicines for some types of cancer
medicines for stomach problems
NSAIDs, medicines for pain and inflammation, like ibuprofen or naproxen
seizure or epilepsy medicine like carbamazepine, phenytoin, and valproic acid
Note: This information is not intended to cover all possible uses, precautions, interactions, or adverse effects for this drug. If you have question about the drug(s) you are taking, check with your health care professional.