Evaluation of drug efficacy by a preference technic.
D001172:Arthritis, Rheumatoid / Q000188:drug therapy*; D001241:Aspirin / Q000008:administration & dosage; D002110:Caffeine / Q000008:administration & dosage; D003907:Dexamethasone / Q000008:administration & dosage; D011431:Dextropropoxyphene / Q000008:administration & dosage*; D006801:Humans; D006993:Hypnotics and Sedatives / Q000008:administration & dosage*; D009966:Orphenadrine / Q000008:administration & dosage; D010615:Phenacetin / Q000008:administration & dosage; D012631:Secobarbital / Q000008:administration & dosage*
D006993:Hypnotics and Sedatives; D012631:Secobarbital; D002110:Caffeine; D003907:Dexamethasone; D009966:Orphenadrine; D010615:Phenacetin; D001241:Aspirin; D011431:Dextropropoxyphene