title: I'm 75, and I've always taken Benadryl for my allergies.  My doctor advised me to switch to a prescription allergy medication.  Why?
mesh_terms: D000367:Age Factors; D000368:Aged; D018926:Anti-Allergic Agents / Q000009:adverse effects* / Q000494:pharmacology / Q000627:therapeutic use; D004155:Diphenhydramine / Q000009:adverse effects* / Q000627:therapeutic use; D006801:Humans; D006967:Hypersensitivity / Q000188:drug therapy*; D012894:Sleep Stages / Q000187:drug effects
chemical_list: D018926:Anti-Allergic Agents; D004155:Diphenhydramine