Subjective assessment of analgesics.
D000328:Adult; D000368:Aged; D000700:Analgesics / Q000627:therapeutic use*; D001241:Aspirin / Q000627:therapeutic use; D005069:Evaluation Studies as Topic; D006801:Humans; D008875:Middle Aged; D010146:Pain / Q000188:drug therapy; D010919:Placebos
D000700:Analgesics; D010919:Placebos; D001241:Aspirin