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Warfarin uses

Warfarin information

Warfarin is an anti-coagulant or a medicine which helps in the thinning of the blood.

Warfarin indications

This medication is indicated for the reduction of blood clotting essential for the prevention of heart attacks, stroke and the blocking of arteries and veins.

Warfarin may also be prescribed to treat other medical conditions aside from the ones mentioned above.

Warfarin warnings

Due to the anti clotting property of Warfarin, it should be administered with care and preferably under doctor's monitoring for patients who have the following medical conditions:

Have recently had surgery

Ill with stomach ulcers, or any other forms of bleeding

Have had stroke caused by bleeding in the brain

Have had aneurysm

Have had spinal fracture or had been exposed to lumbar block anesthesia

Have bacterial endocarditis, pericarditis, and pericardial effusion.

Warfarin may also not be strongly recommended for patients with the following medical conditions:

Kidney problems

Liver diseases


Have congenital and or hereditary Protein C or Protein S deficiency


Polycythemia Vera


Congestive heart failure

Collagen vascular disorder

Thyroidal problems

High cholesterol


Vitamin K deficiency

On the process of surgery

Taking antibiotics to treat infection

Warfarin and pregnancy

This medicine is belong to the drugs categorized under Pregnancy Category X which means that taking Warfarin may cause harm to the unborn, cause birth defects and birth problems.

However, this drug is not detected on the breast milk. But is would still be safe and wise to consult your doctor first before deciding to breast feed when taking Warfarin.

Warfarin intake guidelines

This product must be taken exactly as prescribed by your doctor, if the instructions given by your doctor are unclear, you must verify them from a medical authority such as a pharmacist or nurse.

Each dose of Warfarin must be taken with a full glass of water. The medication should be taken at about the same time of each day and it could be taken with or without food.

Regular monitoring of blood such as PT and INR tests should be performed regularly to monitor the need to increase or decrease dosage of Warfarin.

Never take more or less of this drug. Always follow the prescribed dosage for intake.

Avoid abrupt changes in your diet. The consumption of Vitamin K may significantly decrease the effects of the medicine. Vitamin K can be mostly obtained from spinach, Swiss Chard, coriander, collards, and cabbages.


Warfarin dosage

The dosage for Warfarin intake must be obtained from a doctor. The doctor may still perform necessary blood tests and other examinations before prescribing the exact dosage.

Warfarin overdose

Overdose of the drug may be characterized by:


Visibility of small broken blood vessels under the skin

Excessive bleeding from cuts and wounds

Bleeding on the gums

Blood on stool, urine or vomitus

Excessive menstrual bleeding

Overdose of Warfarin may become fatal especially if left untreated as they may result to hemorrhage. Immediately seek medical attention if any of these symptoms occur.

Warfarin missed dose

The missed dose of Warfarin must be taken as soon as it is remembered. However, if it is almost time for the next dose, forego the missed dose and wait for the next dose.

Warfarin side effects

Taking Warfarin may entail some serious side effects such as:

allergic reactions characterized by hives, swelling of lips, throat and mouth and the closing of throat passage.

black, bloody and tarry stools

blood in urine and vomitus

coughing of blood

bleeding gums, and sores in the mouth

decrease in the amount of urine

purple discoloration of toes and fingernails

easy bruising

sudden leg and foot pains

unusual bleeding and heavy menstrual periods

If you experience any of the mentioned side effects, you should seek medical attention immediately.

Some of the less serious side effects may include:

excessive retention of gas and bloating



stomach and digestive problems

decrease in appetite and unusual weight loss

If you experience any of the following side effects, talk to your doctor immediately. These less serious side effects are more likely to occur when you are taking Warfarin.

Warfarin drug reactions

This medication may interact with other drugs and it is best to inform your doctor if you are taking other medicines or drugs aside from Warfarin.


Warfarin pharmaceutical active ingredients containing related brand and generic drugs:

infoActive ingredient is the part of the drug or medicine which is biologically active. This portion of the drug is responsible for the main action of the drug which is intended to cure or reduce the symptom or disease. The other portions of the drug which are inactive are called excipients; there role is to act as vehicle or binder. In contrast to active ingredient, the inactive ingredient's role is not significant in the cure or treatment of the disease. There can be one or more active ingredients in a drug.

Warfarin available forms, composition, doses:

infoForm of the medicine is the form in which the medicine is marketed in the market, for example, a medicine X can be in the form of capsule or the form of chewable tablet or the form of tablet. Sometimes same medicine can be available as injection form. Each medicine cannot be in all forms but can be marketed in 1, 2, or 3 forms which the pharmaceutical company decided based on various background research results.
Composition is the list of ingredients which combinedly form a medicine. Both active ingredients and inactive ingredients form the composition. The active ingredient gives the desired therapeutic effect whereas the inactive ingredient helps in making the medicine stable.
Doses are various strengths of the medicine like 10mg, 20mg, 30mg and so on. Each medicine comes in various doses which is decided by the manufacturer, that is, pharmaceutical company. The dose is decided on the severity of the symptom or disease.

Apo-Warfarin 1 mg Tablet0.18 USD
Apo-Warfarin 10 mg Tablet0.28 USD
Apo-Warfarin 2 mg Tablet0.19 USD
Apo-Warfarin 2.5 mg Tablet0.15 USD
Apo-Warfarin 3 mg Tablet0.24 USD
Apo-Warfarin 4 mg Tablet0.24 USD
Apo-Warfarin 5 mg Tablet0.16 USD
Coumadin 1 mg tablet0.33 USD
Coumadin 10 mg tablet0.5 USD
Coumadin 2 mg tablet0.35 USD
Coumadin 2.5 mg tablet0.28 USD
Coumadin 3 mg tablet0.43 USD
Coumadin 4 mg tablet0.43 USD
Coumadin 5 mg tablet0.28 USD
Coumadin 5 mg vial34.07 USD
Coumadin 6 mg tablet1.94 USD
Coumadin 7.5 mg tablet1.97 USD
Jantoven 1 mg tablet0.49 USD
Jantoven 10 mg tablet0.76 USD
Jantoven 2 mg tablet0.56 USD
Jantoven 2.5 mg tablet0.53 USD
Jantoven 3 mg tablet0.53 USD
Jantoven 4 mg tablet0.56 USD
Jantoven 5 mg tablet0.59 USD
Jantoven 6 mg tablet0.72 USD
Jantoven 7.5 mg tablet0.74 USD
Mylan-Warfarin 1 mg Tablet0.18 USD
Mylan-Warfarin 10 mg Tablet0.28 USD
Mylan-Warfarin 2 mg Tablet0.19 USD
Mylan-Warfarin 2.5 mg Tablet0.15 USD
Mylan-Warfarin 3 mg Tablet0.24 USD
Mylan-Warfarin 4 mg Tablet0.24 USD
Mylan-Warfarin 5 mg Tablet0.16 USD
Novo-Warfarin 1 mg Tablet0.18 USD
Novo-Warfarin 2 mg Tablet0.19 USD
Novo-Warfarin 2.5 mg Tablet0.15 USD
Novo-Warfarin 3 mg Tablet0.24 USD
Novo-Warfarin 4 mg Tablet0.24 USD
Novo-Warfarin 5 mg Tablet0.16 USD
Tablets; Oral; Warfarin Sodium 1 mg
Tablets; Oral; Warfarin Sodium 10 mg
Tablets; Oral; Warfarin Sodium 2 mg
Tablets; Oral; Warfarin Sodium 2.5 mg
Tablets; Oral; Warfarin Sodium 3 mg
Tablets; Oral; Warfarin Sodium 4 mg
Tablets; Oral; Warfarin Sodium 5 mg
Tablets; Oral; Warfarin Sodium 6 mg
Tablets; Oral; Warfarin Sodium 7.5 mg
Taro-Warfarin 1 mg Tablet0.18 USD
Taro-Warfarin 10 mg Tablet0.28 USD
Taro-Warfarin 2 mg Tablet0.19 USD
Taro-Warfarin 2.5 mg Tablet0.15 USD
Taro-Warfarin 3 mg Tablet0.24 USD
Taro-Warfarin 4 mg Tablet0.24 USD
Taro-Warfarin 5 mg Tablet0.16 USD
Taro-Warfarin 6 mg Tablet0.31 USD
Taro-Warfarin 7.5 mg Tablet0.33 USD
Warfarin 1 mg Tablet0.18 USD
Warfarin 10 mg Tablet0.28 USD
Warfarin 2 mg Tablet0.19 USD
Warfarin 2.5 mg Tablet0.15 USD
Warfarin 3 mg Tablet0.24 USD
Warfarin 4 mg Tablet0.24 USD
Warfarin 5 mg Tablet0.16 USD
Warfarin sodium 1 mg tablet0.61 USD
Warfarin sodium 10 mg tablet1.0 USD
Warfarin sodium 2 mg tablet0.63 USD
Warfarin sodium 2.5 mg tablet0.65 USD
Warfarin sodium 3 mg tablet0.66 USD
Warfarin sodium 4 mg tablet0.66 USD
Warfarin sodium 5 mg tablet0.65 USD
Warfarin sodium 6 mg tablet0.68 USD
Warfarin sodium 7.5 mg tablet0.96 USD
Warfarin sodium powder54.53 USD


Warfarin destination | category:

infoDestination is defined as the organism to which the drug or medicine is targeted. For most of the drugs what we discuss, human is the drug destination.
Drug category can be defined as major classification of the drug. For example, an antihistaminic or an antipyretic or anti anginal or pain killer, anti-inflammatory or so.

Warfarin Anatomical Therapeutic Chemical codes:

infoA medicine is classified depending on the organ or system it acts [Anatomical], based on what result it gives on what disease, symptom [Therapeutical], based on chemical composition [Chemical]. It is called as ATC code. The code is based on Active ingredients of the medicine. A medicine can have different codes as sometimes it acts on different organs for different indications. Same way, different brands with same active ingredients and same indications can have same ATC code.

Warfarin pharmaceutical companies:

infoPharmaceutical companies are drug manufacturing companies that help in complete development of the drug from the background research to formation, clinical trials, release of the drug into the market and marketing of the drug.
Researchers are the persons who are responsible for the scientific research and is responsible for all the background clinical trials that resulted in the development of the drug.



  1. Dailymed."WARFARIN SODIUM TABLET [BRYANT RANCH PREPACK]". https://dailymed.nlm.nih.gov/dailym... (accessed August 28, 2018).
  2. "warfarin". https://pubchem.ncbi.nlm.nih.gov/co... (accessed August 28, 2018).
  3. "warfarin". http://www.drugbank.ca/drugs/DB0068... (accessed August 28, 2018).

Frequently asked Questions

Can i drive or operate heavy machine after consuming Warfarin?

Depending on the reaction of the Warfarin after taken, if you are feeling dizziness, drowsiness or any weakness as a reaction on your body, Then consider Warfarin not safe to drive or operate heavy machine after consumption. Meaning that, do not drive or operate heavy duty machines after taking the capsule if the capsule has a strange reaction on your body like dizziness, drowsiness. As prescribed by a pharmacist, it is dangerous to take alcohol while taking medicines as it exposed patients to drowsiness and health risk. Please take note of such effect most especially when taking Primosa capsule. It's advisable to consult your doctor on time for a proper recommendation and medical consultations.

Is Warfarin addictive or habit forming?

Medicines are not designed with the mind of creating an addiction or abuse on the health of the users. Addictive Medicine is categorically called Controlled substances by the government. For instance, Schedule H or X in India and schedule II-V in the US are controlled substances.

Please consult the medicine instruction manual on how to use and ensure it is not a controlled substance.In conclusion, self medication is a killer to your health. Consult your doctor for a proper prescription, recommendation, and guidiance.



sDrugs.com conducted a study on Warfarin, and the result of the survey is set out below. It is noteworthy that the product of the survey is based on the perception and impressions of the visitors of the website as well as the views of Warfarin consumers. We, as a result of this, advice that you do not base your therapeutic or medical decisions on this result, but rather consult your certified medical experts for their recommendations.

Visitor reports

One visitor reported price estimates

What is your opinion about drug cost? Did you feel the cost is apt, or did you feel it is expensive?
The report given by the sDrugs.com website users shows the following figures about several people who felt the medicine Warfarin is expensive, and the medicine is not expensive. The results are mixed. The perception of the cost of the medicine to be expensive or not depends on the brand name of the medicine, country, and place where it is sold, and the affordability of the patient. You can choose a generic drug in the place of the branded drug to save the cost. The efficiency of the medicine will not vary if it is generic or a branded one.

Two visitors reported doses

What is the dose of Warfarin drug you are taking?
According to the survey conducted among sDrugs.com website users, the maximum number of people are using the following dose 1-5mg. Few medications come in only one or two doses. Few are specific for adult dose and child dose. The dose of the medicine given to the patient depends on the severity of the symptom/disease. There can be dose adjustments made by the doctor, based on the progression of the disease. Follow-up is important.

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The information was verified by Dr. Arunabha Ray, MD Pharmacology

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