Coumadin Side Effects, Before Taking, How to Take & More

Coumadin is a blood thinner and an anti-coagulant. It decreases the amount of blood clotting proteins and keeps the blood flowing smoothly. Coumadin is used in the prevention of blood clots and the treatment of blood clots formed in conditions such as:

  • Deep vein thrombosis
  • Pulmonary embolus


By preventing the blood clots from forming, the risk of a heart attack is reduced. The conditions which increase the risk of blood clots include the following:

  • Atrial fibrillation
  • Heart valve replacement
  • Recent heart attack
  • Hip and knee replacement surgeries


Side Effects

If you are using Coumadin with consultation from your doctor, then you should keep the fact in mind that he has weighed the pros and cons of the medicine before prescribing them to you.

Minor Side Effects

There are some minor side effects of using Coumadin. Depending on their severity, they may not even need medical attention. Since it is new for the body, it will take some time to adjust to Coumadin, and these side effects will go after some time naturally. The side effects you might experience include:

  • Nausea
  • Loss of appetite
  • Abdominal pain


If these side effects don’t go away for a long time, contact your physician.

Serious Side effects

Inform your healthcare provider if any of these serious side effects occur:

  • Unusual pain
  • Easy bruising
  • Prolonged bleeding from gums
  • Frequent nosebleeds
  • Prolonged menstrual flow
  • Dark urine
  • Coughing up blood

Developing an allergic reaction to Coumadin is uncommon. It is rare to get a severe allergic reaction such as difficulty in breathing or swelling of the tongue, throat or face due to this drug.

If you notice side effects other than the ones listed above, then you should contact your physician and discuss it as soon as possible.


How to Use

If you have any specific queries about Coumadin, ask your physician or the pharmacist when you go to buy the medication.

This medication is taken orally, usually once daily as prescribed by your healthcare provider. The amount of Coumadin to be taken depends on your medical condition as well as the duration of the treatment. Since Coumadin may interact with other drugs, make sure you tell your doctor about all the medications you are taking. The amount of medication and the time period for which it is to be taken depends on your medical condition and other factors that are determined by your physician.



If you are allergic to Coumadin or if you have any other kind of allergies, it is better to inform your healthcare provider before starting your dosages. There can be some inactive ingredients in Coumadin which may also cause allergic reactions. To know more details, you should talk to your doctor.

Your physician should be familiar with your complete medical history as this is very crucial. If you have suffered from the following in the past or are under treatment for the following, your doctor should know beforehand:

  • Blood disorders
  • Anemia
  • Hemophilia
  • Bleeding of the intestines
  • Bleeding in the brain
  • Aneurysms
  • Recent major surgery
  • Kidney disease
  • Liver disease
  • Alcohol use
  • Memory problems


Before undergoing surgery, inform your doctor about all the medications that you are taking.

While taking this medication, avoid getting injections in your muscles.

Limit your use of alcohol while taking this medication since it increases the risk of stomach bleeding.

The risks and benefits of using Coumadin during pregnancy should be discussed with the doctor, and it should be used only when necessary.

If you are breastfeeding, consult your doctor since Coumadin may pass into the breast milk.