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A member asked:
How long does a 81 mg asprin remain effective?
A doctor has provided 1 answer
Aspirin : Is primarily a pain killer and the effect generally lasts about four hours. A second effect of aspirin is the "thinning" of the blood which is utilized by health professionals to prevent heart attacks and strokes (caused by clots). This effect of aspirin can last 7 to 10 days. This is why you must stop using it a week before any surgery.
Answered 6/1/2017
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