Active Ingredient

Olanzapine

Olanzapine is an atypical antipsychotic medication. It is commonly used to help manage symptoms of certain mental health conditions.

It may be prescribed in situations where individuals experience disturbances in mood, thought, or behavior.

Written By Douglas C. Goldberg, MD

Reviewed By Philip Schein, MD

Last Updated 28 Nov 2025

Available Olanzapine Brands

Zyprexa

Strengths 2.5mg, 5mg, 7.5mg, 10mg, 15 mg, 20mg

Strengths 2.5mg, 5mg, 7.5mg

Olanzapine is primarily used to treat various mental health disorders. It can help improve mood, thoughts, and behavior.

Olanzapine works by affecting the levels of certain neurotransmitters in the brain, such as dopamine and serotonin.

These neurotransmitters are involved in mood regulation and perception.

By balancing these chemicals, Olanzapine helps to reduce symptoms like hallucinations, delusions, and mood swings.

Not everyone experiences side effects from Olanzapine, and many are mild and temporary. However, it’s important to be aware of them.

If you experience serious or persistent side effects, contact your doctor.

Monitor your weight regularly, as Olanzapine can cause weight gain.
Avoid consuming alcohol while taking this medication, as it can increase drowsiness.
Be cautious when driving or operating machinery until you know how Olanzapine affects you.
Inform your doctor about any other medications you are taking to avoid interactions.
Do not stop taking Olanzapine suddenly without consulting your healthcare provider.

Always talk to your doctor if you have concerns or experience unusual symptoms.

What is Olanzapine used for?

Olanzapine is used to treat mental health conditions such as schizophrenia and bipolar disorder.

How long does it take for Olanzapine to work?

Some symptoms may improve within a few days, but it can take several weeks to feel the full effects.

Is Olanzapine safe for long-term use?

Your doctor will assess the risks and benefits of long-term use based on your specific condition.

Can Olanzapine be taken with other medications?

It’s important to inform your doctor about all medications you are taking to avoid potential interactions.

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

If you miss a dose, take it as soon as you remember unless it’s close to the time for your next dose.