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Dear Carol- Navane is in a class of drugs called antipsychotics. It is a high potency dopamine antigonist. As a pharmacist for Athena Rx Home Pharmacy, we tend not to see Navane prescribed for Parkinsonian patients because Navane tends to block the dopaminergic receptor; therefore, increasing Parkinsonian symptoms by decreasing the effects of dopamine. There is a newer class of drugs called "Atypical Serotonin-Dopamine Receptor Antagonists". This class of drugs includes Clozaril, Zyprexa, Seroquel and Risperdal. At Athena we see a these agents used to help treat hallucinations caused by Parkinsonian medications. However, when prescribed they are dosed much lower than the dose used to treat psychosis. I would recommend that you talk with her neurologist regarding Navane. If your mother is having trouble sleeping there are a lot of other medications that may be used as first-line for sedation. I welcome the opportunity to answer additional questions for you. If you have any questions, please feel free to contact me at 1-800-537-8899 ext. 6104. Sincerely, Dominic Marchese, RPh. Athena Rx Home Pharmacy Pharmacy Service Specialist 1-800-5-ATHENA