Coumadin (Warfarin) Side Effects and Dosage Information

Coumadin is a classified under the medicine group called anticoagulants. Its generic name is Warfarin and it is also sometimes known as the blood thinner. However, this name is a misnomer, as it does not make the blood thin. Coumadin helps decrease the chances of heart attacks by curing blood clots and preventing the blood from clotting in the body. The people, who mostly suffer from internal blood clots, are the patients of heart attacks, heart surgeries like heart valve replacements, and some patients with unusual heart rates. Some patients that have been through hip or knee replacement surgeries can also face the problem of blood clotting inside the body. This is why Coumadin is used to ensure that the blood flows smoothly within the body, and does not form clots. Coumadin does not dissolve the blood clots, but treats the blood clots formed within the heart, lungs, veins and arteries of a patient. If there are blood clots within a person’s body, they might cause really serious problems like heart attacks, stroke, and pulmonary embolism. Coumadin works quickly and takes from 24 hours-96 hours to work on the problematic blood clots.


The doctor normally assesses the conditions of the patient before prescribing Coumadin. The doctor gives a dosage suitable to the patient’s condition and needs, keeping all of important facts like age, history of important surgeries or past problems in mind. The dosage is determined through an INR that is carried out with a timed gap in between each appointment. It is important to get the right dosage of Coumadin, as there might be adverse Coumadin side effects to face if too little or too much of the dosage is taken. If the dosage taken is less than what is prescribed, it might lead to formation of blood clots within the body. On the other hand, even a slight over dosage could lead to increase in bleeding. Once Coumadin has been prescribed, the patient would have to keep a proper check on their eating habits and their diet. It is best to consult the doctor about what kind of diet should be followed, and it is advisable to not make any decisions out of your own accord. Alcohol consumption, strenuous activities and any activities that might have a chance of injury, must be avoided at all costs. Patients taking Coumadin, who are looking to lose weight, should consult the doctor before taking any step. Any changes made to the diet or activities, big or small, may cause Coumadin side effects in the body.

Coumadin Side Effects

Most people using Coumadin do not have to suffer any serious side effects. Since the dosage is heavily monitored, it is important to keep a track of any changes that might take place while taking the medicine. Coumadin side effects include stomach pains, vomiting, nausea and lack of appetite. If these side effects worsen and continue to cause irritation, it is best to immediately consult the doctor. Other side effects include increase in bleeding or formation of blood clots. If the doctor decides to discontinue the dosage, the patient might still experience problems for a week after that. It is important to immediately inform the doctor about any bleeding, internal pains or suspicious swellings in the body as these are all its side effects. Some of the other side effects include dizziness, fatigue, heart pains, skin damage and blurry vision.