Ondansetron is a serotonin 5-HT3 receptor antagonist used to prevent nausea and vomiting caused by chemotherapy, radiation therapy, and surgery. It works by blocking serotonin receptors in the brain and gut.

Ondansetron Hydrochloride FAQ


What is ondansetron used for?

Ondansetron prevents nausea and vomiting caused by chemotherapy, radiation therapy, and surgery.

How does ondansetron work?

It blocks serotonin 5-HT3 receptors in the brain and gut to reduce nausea signals.

What are common side effects of ondansetron?

Mild side effects include headache, dizziness, and constipation. Serious side effects are rare.

Can I take ondansetron during pregnancy?

It may be prescribed if benefits outweigh risks; consult your doctor for personalized advice.

How is ondansetron administered?

Available in oral tablets, oral solution, or injection; administration route depends on the situation.

What is the typical dosage of ondansetron?

Dosage varies by condition; typically 4mg or 8mg every 6-8 hours as directed.

Can ondansetron be taken with food?

It can be taken with or without food, depending on your preference or doctor's advice.

Does ondansetron cause drowsiness?

Drowsiness is uncommon but may occur; avoid driving if affected.

Is ondansetron safe for children?

Pediatric use is approved for certain conditions; follow your doctor's guidance.

Can I take ondansetron with other medications?

Inform your doctor about all medications to avoid potential interactions.

How long does ondansetron take to work?

It typically starts working within 30 minutes to 2 hours.

Can ondansetron prevent all types of nausea?

It's primarily effective for chemotherapy, radiation, and post-surgery nausea.

Is ondansetron available over-the-counter in Malaysia?

No, it's a prescription-only medication.

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

Take it as soon as you remember, but skip if it's almost time for the next dose.

Can ondansetron be used for motion sickness?

It's not typically recommended for motion sickness.

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