Ondansetron is a medication used to prevent nausea and vomiting caused by cancer chemotherapy, radiation therapy, or surgery. It works by blocking the actions of chemicals in the body that can trigger these symptoms, providing effective relief for patients undergoing treatment.

Ondansetron FAQ


What is Ondansetron used for?

Ondansetron is primarily used to prevent nausea and vomiting caused by chemotherapy, radiation, or surgery.

How does Ondansetron work?

It works by blocking serotonin receptors in the brain, which are involved in triggering nausea.

What forms does Ondansetron come in?

Ondansetron is available in tablets, dissolving films, and injectable forms.

Can I take Ondansetron for morning sickness?

While Ondansetron is used for nausea, it's best to consult with a doctor before using it for morning sickness.

Are there any side effects of Ondansetron?

Possible side effects include headaches, constipation, and dizziness.

Is Ondansetron safe for children?

Ondansetron can be used in children, but dosages should be determined by a healthcare professional.

How should I take Ondansetron?

Take Ondansetron exactly as directed by your doctor, usually 30 minutes before chemotherapy or surgery.

Can I drink alcohol while taking Ondansetron?

It's advisable to avoid alcohol as it may increase the risk of side effects.

What should I do if I miss a dose?

If you miss a dose, take it as soon as you remember but skip it if it's almost time for your next dose.

Can Ondansetron cause allergic reactions?

Like any medication, Ondansetron can cause allergic reactions; seek medical help if you notice rash or swelling.

Can I safely stop taking Ondansetron?

Consult your doctor before stopping Ondansetron to ensure it's safe based on your treatment.

Is it possible to overdose on Ondansetron?

Yes, overdosing can lead to serious symptoms; seek immediate medical attention if you suspect an overdose.

Can pregnant women use Ondansetron?

Pregnant women should discuss the benefits and risks of Ondansetron with their healthcare provider.

How long does it take for Ondansetron to work?

Ondansetron typically begins to work within 30 minutes to an hour after taking it.

Where can I buy Ondansetron?

Ondansetron can be purchased at pharmacies, but a prescription is often required.

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Information provided by Dr. Tekeste Etay Teka. Reviewed by Dr. Mohamed El Khouly