Ask the doctor.  I've heard you should take an aspirin if you think you are having a heart attack.  I already take aspirin (325 mg) every day.  Should I still take an aspirin if I feel a heart attack coming on?
Lee
Richard
R
D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000008:administration & dosage*; D001241:Aspirin / Q000008:administration & dosage*; D004305:Dose-Response Relationship, Drug; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D009203:Myocardial Infarction / Q000517:prevention & control*; D010353:Patient Education as Topic
D000894:Anti-Inflammatory Agents, Non-Steroidal; D001241:Aspirin