title: Decreased serotoninergic activity in Tourette syndrome.
mesh_terms: D002648:Child; D003533:Cyproheptadine / Q000008:administration & dosage / Q000009:adverse effects* / Q000627:therapeutic use; D004298:Dopamine / Q000502:physiology; D006220:Haloperidol / Q000627:therapeutic use; D006801:Humans; D008297:Male; D008774:Methylphenidate / Q000627:therapeutic use; D012701:Serotonin / Q000502:physiology*; D005879:Tourette Syndrome / Q000188:drug therapy*
chemical_list: D008774:Methylphenidate; D003533:Cyproheptadine; D012701:Serotonin; D006220:Haloperidol; D004298:Dopamine