dose of aspirin post myocardial infarction

Last reviewed 01/2018

Aspirin reduces the mortality from myocardial infarction.

  • patients with suspected acute myocardial infarctin should be treated with aspirin 150 mg daily.
  • patients with a proven acute myocardial infarction should be continued on aspirin 150mg daily for one month.
  • after one month patients should be treated with 75mg aspirin daily. This dose should be continued long-term (1,2)


  1. MeReC Bulletin 2005; 15(6): 21-24.
  2. BMJ 1998; 316: 1303-9.
  3. ISIS-2 Randomised trial of intravenous streptokinase, oral aspirin, both, or neither among 17187 cases of suspected myocardial infarction:ISIS-2. Lancet 1990; 336: 71-5.