Active Ingredient

Clozapine

Clozapine is a medication primarily used in the management of certain mental health disorders. It is known for its effectiveness in cases where other treatments may not have worked.

This medication is typically prescribed under careful medical supervision due to its specific effects and monitoring requirements.

Written By Douglas C. Goldberg, MD

Reviewed By Philip Schein, MD

Last Updated 28 Nov 2025

Available Clozapine Brands

Clozaril

Strengths 50mg, 100mg

Clozapine

Strengths 25 mg, 50 mg, 100 mg

Clozapine Uses

Clozapine is mainly used for managing symptoms associated with certain psychiatric conditions.

Treatment-resistant schizophrenia
Reducing the risk of recurrent suicidal behavior in schizophrenia or schizoaffective disorder
Schizophrenia in patients who have not responded to other antipsychotic medications

How Clozapine Works

Clozapine works by affecting the balance of certain neurotransmitters in the brain, which are chemicals that transmit signals between nerve cells.

As an atypical antipsychotic, it targets multiple neurotransmitter receptors, helping to stabilize mood and reduce symptoms such as hallucinations and delusions.

This action helps improve thought processes and emotional responses in individuals with schizophrenia.

Common side effects of Clozapine

Not everyone experiences side effects with clozapine, and many side effects can be mild and temporary.

Drowsiness
Increased saliva production
Weight gain
Dizziness
Constipation
Fast heart rate
Fever

If you experience serious or persistent symptoms, it is important to contact your healthcare provider.

Regular blood tests are necessary to monitor your health while taking clozapine.
Avoid consuming large amounts of alcohol, as it can increase certain side effects.
Inform your doctor about all other medications you are taking to avoid interactions.
Do not drive or operate heavy machinery until you know how clozapine affects you.
If you experience symptoms like sore throat, fever, or weakness, seek medical attention promptly.

Always consult your doctor for personalized medical advice and follow their instructions carefully.

Frequently Asked Questions

What is clozapine used for?

Clozapine is used to treat schizophrenia in patients who have not responded to other treatments and to reduce the risk of suicidal behavior in certain patients.

How long does it take for clozapine to work?

The effects of clozapine can vary, but some patients may start noticing improvements in symptoms within a few weeks.

Is clozapine safe for long-term use?

Clozapine can be used long-term under careful medical supervision, with regular monitoring to manage any potential side effects.

Can clozapine be taken with other medications?

Clozapine may interact with other medications, so it is important to inform your doctor about all medicines you are taking.

What should I do if I miss a dose of clozapine?

If you miss a dose, contact your healthcare provider for advice on how to proceed. Do not double up on doses to make up for a missed one.