title: 74-year-old woman with new-onset myoclonus.
authors.affiliation: Mayo School of Graduate Medical Education, Mayo Clinic, Rochester, MN 55905, USA.
authors.forename: Ladan
authors.initials: L
authors.lastname: Zand
authors.forename: Scott J
authors.initials: SJ
authors.lastname: Hoffman
authors.forename: Mark A
authors.initials: MA
authors.lastname: Nyman
mesh_terms: D000368:Aged; D000544:Alzheimer Disease / Q000188:drug therapy; D003533:Cyproheptadine / Q000008:administration & dosage / Q000627:therapeutic use*; D003937:Diagnosis, Differential; D018492:Dopamine Antagonists / Q000008:administration & dosage / Q000009:adverse effects; D004305:Dose-Response Relationship, Drug; D005260:Female; D005500:Follow-Up Studies; D006634:Histamine H1 Antagonists / Q000008:administration & dosage / Q000627:therapeutic use*; D006801:Humans; D009207:Myoclonus / Q000175:diagnosis / Q000209:etiology* / Q000628:therapy; D018967:Risperidone / Q000008:administration & dosage / Q000009:adverse effects*; D020230:Serotonin Syndrome / Q000139:chemically induced* / Q000175:diagnosis / Q000628:therapy
chemical_list: D018492:Dopamine Antagonists; D006634:Histamine H1 Antagonists; D003533:Cyproheptadine; D018967:Risperidone