title: Aspirin not effective in some people.  Failure to take the drug may be the most common reason.
mesh_terms: D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000627:therapeutic use; D001241:Aspirin / Q000627:therapeutic use*; D004305:Dose-Response Relationship, Drug; D004334:Drug Administration Schedule; D006801:Humans; D055118:Medication Adherence; D009203:Myocardial Infarction / Q000517:prevention & control*; D010975:Platelet Aggregation Inhibitors / Q000627:therapeutic use*; D020521:Stroke / Q000517:prevention & control*
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; D010975:Platelet Aggregation Inhibitors; D001241:Aspirin