When NOT to reach for aspirin.  When heart attack symptoms strike, call for help instead.
D001241:Aspirin / Q000008:administration & dosage*; D004632:Emergency Medical Services; D005343:Fibrinolytic Agents / Q000008:administration & dosage*; D006801:Humans; D009203:Myocardial Infarction / Q000628:therapy*; D013689:Telephone
D005343:Fibrinolytic Agents; D001241:Aspirin