Caffeine revisited.
D000277:Adjuvants, Pharmaceutic; D000700:Analgesics / Q000008:administration & dosage*; D002110:Caffeine / Q000008:administration & dosage*; D002986:Clinical Trials as Topic; D006801:Humans; D010146:Pain / Q000188:drug therapy*
D000277:Adjuvants, Pharmaceutic; D000700:Analgesics; D002110:Caffeine