How Long Does The Blood-Thinning Drug, Warfarin Stay In You Body After Ending The Prescribed Course?


2 Answers

James Parnell Profile
James Parnell answered
Usually it is presumed that Warfarin could stay in the body for up four days after completing the course of medication.

However, this will vary from person to person, and may also depend on the dosage you have been taking.

How long does Warfarin stay in your system?
  • Marevan (Warfarin) is primarily used to prevent abnormal blood clots in health conditions which give rise to an increased risk of such events (such as atrial fibrillation and rheumatic heart disease), and also after insertion of prosthetic or artificial heart valves.
  • The medicine is also used to treat and prevent blood clots blocked in the veins on the leg or deep vein thrombosis, as well as blood clots that have travelled through the lungs or pulmonary embolism.
  • Marevan tablets contain the active ingredient Warfarin, a type of medicine known as an oral anticoagulant, which is usually used to prevent blood clots developing in the blood vessels.
  • Marevan (Warfarin) works by blocking the vitamin K-dependent production of a few clotting factors. Without these clotting factors, a protein called fibrinogen cannot be converted into another protein called fibrin, making blood clots less likely to occur.
  • Doctors take regular blood samples and adjust the dose of their patients as necessary to make sure the patient's International Normalised Ratio (INR) fall into the effective range for their condition.
denise  goodwin Profile
denise goodwin answered
This is what I could find out. The half life of the drug is about 40 hours. That is the amount of time your body takes to eliminate half of the drug from the system.

While the anticoagulant effect of Warfarin generally begins within 24 hours of taking the drug, the peak effect may take up to four days.

As the effective half-life of warfarin is about 40 hours, and the anticoagulant effect is delayed, it takes several days after any dosing change before plasma concentrations and anticoagulant effects reach a steady state.

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