Your patients are on drugs.
D000293:Adolescent; D000294:Adolescent Behavior / Q000187:drug effects*; D001289:Attention Deficit Disorder with Hyperactivity / Q000188:drug therapy; D000697:Central Nervous System Stimulants / Q000494:pharmacology*; D002648:Child; D002652:Child Behavior / Q000187:drug effects*; D005881:Gingiva / Q000187:drug effects; D006801:Humans; D008774:Methylphenidate / Q000494:pharmacology*
D000697:Central Nervous System Stimulants; D008774:Methylphenidate