Evening.: Aspirin inhibits platelets irreversibly. The effect wears off as time goes on and is renewed when the new dose is taken. Since most heart attacks occur in the early am the greatest protection will be achieved by taking Aspirin at night.
Answered 11/28/2017
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Interesting ???: I don't know if that has ever been studied, my guess would be that night is better since early am is a frequent time for chest pain, and you might not be taking this early enough in the day otherwise. What is important is to take it daily.
Answered 4/9/2016
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