Different types of blood-thinning medications stay in a patient's system for varying lengths of time. For example, aspirin's blood-thinning effect on platelets lasts for about a week, while warfarin takes three to four days to clear from the body, according to Angiologist.com.
The length of time it takes for blood thinners to clear from a person's body depends on the type of drug and the workings of the individual person's body, Angiologist.com continues. If a patient has liver or kidney problems, for example, drugs take longer to clear. Some medications and herbal supplements can also affect this process.
Newer blood thinners such as Xarelto are designed to clear the body faster than older ones such as warfarin, according to Clot Connect.