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- What is clozapine, and how does it work (mechanism of action)?
- What brand names are available for clozapine?
- Is clozapine available as a generic drug?
- Do I need a prescription for clozapine?
- What are the side effects of clozapine?
- What is the dosage for clozapine?
- Which drugs or supplements interact with clozapine?
- Is clozapine safe to take if I'm pregnant or breastfeeding?
- What else should I know about clozapine?
What is clozapine, and how does it work (mechanism of action)?
Clozapine is an anti-psychotic medication that works by blocking receptors in the brain for several neurotransmitters (chemicals that nerves use to communicate with each other) including dopamine type 4 receptors, serotonin type 2 receptors, norepinephrine receptors, acetylcholine receptors, and histamine receptors. Unlike traditional anti-psychotic agents, such as chlorpromazine (Thorazine) and haloperidol (Haldol) as well as the newer anti-psychotics, risperidone (Risperdal) and olanzapine (Zyprexa), clozapine only weakly blocks dopamine type 2 receptors.
What brand names are available for clozapine?
Clozaril, FazaClo, Versacloz
Is clozapine available as a generic drug?
GENERIC AVAILABLE: Yes
Do I need a prescription for clozapine?
What are the side effects of clozapine?
The most common side effect of clozapine is drowsiness.
Dizziness is another side effect of clozapine. Dizziness may occur in 1 of 5 persons taking clozapine. In some cases this may be due to orthostatic hypotension, a marked decrease in blood pressure that occurs when going from a lying or sitting position to a standing position. The drop in blood pressure may lead to loss of consciousness or even cardiac and respiratory arrest. This reaction is more common during the first few weeks of therapy while the dose is increasing, when drug is stopped briefly, or when patients are taking benzodiazepines such as diazepam (Valium) or other anti-psychotic drugs.
Seizures have occurred in approximately 1 of every 20 to 30 persons receiving clozapine. Patients receiving higher doses seem to be at higher risk.
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