title: Drug research and human sleep.
mesh_terms: D002110:Caffeine / Q000494:pharmacology; D002395:Catecholamines / Q000502:physiology; D004569:Electroencephalography; D004644:Emotions; D006801:Humans; D006993:Hypnotics and Sedatives; D010919:Placebos; D012890:Sleep / Q000187:drug effects* / Q000502:physiology; D013564:Sympathetic Nervous System / Q000502:physiology; D014364:Tryptophan / Q000502:physiology
chemical_list: D002395:Catecholamines; D006993:Hypnotics and Sedatives; D010919:Placebos; D002110:Caffeine; D014364:Tryptophan