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  • Title: Clozapine withdrawal symptoms in a Parkinson's disease patient.
    Author: Zesiewicz TA, Borra S, Hauser RA.
    Journal: Mov Disord; 2002 Nov; 17(6):1365-7. PubMed ID: 12465085.
    Abstract:
    Abrupt clozapine withdrawal can cause rebound psychosis and severe somatic symptoms in psychiatric patients. We report on the case of an advanced Parkinson's disease patient who developed myoclonus, tremor, rigidity, hyperreflexia, and stupor after abrupt clozapine withdrawal. The patient's symptoms resolved with treatment with cyproheptadine. This clinical picture suggests serotonergic rebound as an explanation for the patient's symptoms, although other pharmacological mechanisms are possible. Clozapine should be gradually withdrawn over a period of 1 to 2 weeks when possible, and abruptly discontinued only when necessary.
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