Is Zofran (ondansetron) an over-the-counter medication?

Key takeaways

• Ondansetron (formerly branded as Zofran) is a prescription-only antiemetic medication approved by the FDA to treat nausea and vomiting caused by chemotherapy, radiation treatment, or surgery.
• You can’t buy ondansetron over the counter. You need a prescription from a healthcare professional after a consultation.
• Over-the-counter antihistamines like dimenhydrinate (Dramamine) may help with motion sickness or morning sickness, but they may not work as effectively as ondansetron for other causes of nausea.

Overview

Ondansetron is a medication known as an antiemetic, which means it can help reduce nausea and vomiting. It’s typically used to treat nausea and vomiting that happens as a result of:

• chemotherapy
• radiation treatment
• anesthesia and other drugs used in surgery

Ondansetron isn’t approved for nausea related to pregnancy (also called morning sickness) or for motion sickness. However, some health professionals may prescribe it off-label for these purposes. Off-label refers to the use of a drug for purposes other than its approved uses.

Note: Ondansetron was formerly known as the brand name Zofran, but Zofran has been discontinued. The removal of Zofran from the market was a business decision by the manufacturer and not due to concerns regarding the drug’s safety or effectiveness.

—————-

Need a diagnosis or prescription quickly? Optum Perks offers personalized on-demand care in as little as 15 minutes. For $29, answer a few questions online and receive a diagnosis and treatment plan from a US-licensed healthcare professional. Get started here.

Can I get ondansetron OTC?

Ondansetron isn’t available OTC — you can only get it from a healthcare professional after a consultation. This is typically because it’s used to treat a symptom rather than a root cause.

If you use ondansetron consistently to prevent nausea and vomiting, you may not go to a doctor to see why you’re feeling unwell. This means the medication could mask serious symptoms and prevent diagnosis, leading to an increased risk of complications.

————-

If you need help covering the cost of medications, the free Optum Perks Discount Card could help you save up to 80% on prescription drugs. Plus, you can now get them delivered to your home in as little as 3 days. Search for your medication here.

Are there OTC ondansetron substitutes?

A few OTC antiemetic medications are available that might ease your symptoms instead of prescription ondansetron. For example, OTC antihistamines, such as dimenhydrinate (Dramamine), may help manage nausea in certain instances.

Typically, people use OTC medications for motion sickness or morning sickness in pregnancy. These medications may not have the effect of ondansetron or help you manage nausea and vomiting from other causes.

Learn more about OTC medications for nausea.

Natural antiemetic options

Some steps that you can take to manage nausea and vomiting naturally include:

• Food choices: Bland foods may help manage gastrointestinal upset symptoms, including nausea. Eating small and regular meals and staying hydrated may also help.
• Ginger: Some evidence points to the benefits of natural products containing ginger root. However, experts suggest that more research is needed on this.
• Peppermint: Some 2025 research suggests that inhaling peppermint oil may help with nausea and vomiting.
• Relaxation techniques: The American Cancer Society (ACS) advises that relaxation techniques such as meditation, breathing techniques, and hypnosis may help with nausea and vomiting related to cancer treatment.

Pro tip: Make sure to consult your healthcare professional before trying any OTC medications or natural remedies. They may not be for everyone, and some of them could interact with prescription medications.

Alternative antiemetic medications for ondansetron  

Ondanestron is a 5-HT3 serotonin-receptor antagonist that blocks the parts of a cell that attach to serotonin (a brain chemical). This mechanism of action (how a drug works) may prevent nausea and vomiting symptoms.

Other FDA-approved serotonin antagonists for nausea and vomiting caused by chemotherapy and similar treatments include:

• granisetron (Sustol)
• dolasetron (Anzemet)
• palonosetron (Posfrea)

Other drug classes that may help with general nausea and vomiting symptoms include:

• Dopamine antagonists: These block the action of dopamine in the body, reducing nausea and sickness. Examples include metoclopramide (Reglan).
• Neurokinin antagonists: These block the action of small proteins called neurokinins in the nervous system. These drugs are often used to help with sickness caused by chemotherapy. Examples include aprepitant (Emend) and rolapitant (Varubi).
• Anticholinergics: These block the action of a neurotransmitter in the nervous system called acetylcholine. They are occasionally used to manage motion sickness and nausea after surgery. Examples include transdermal scopolamine (Transderm Scop).
• Cannabinoids: These medications are sometimes used for nausea and vomiting caused by chemotherapy. An example is dronabinol (Marinol).

Next steps

If you’re experiencing nausea and vomiting but you don’t have an ondansetron prescription, here are the next steps you can take:

• Try lifestyle measures like eating a bland diet and staying hydrated.
• Try natural remedies like ginger or mint.
• Try OTC anti-nausea medications like Dramamine.
• Speak with a doctor if your nausea won’t go away or gets worse.

—————

Download the free Optum Perks Discount Card to save up to 80% on many prescription medications. Plus, you can now get them delivered to your home in as little as 3 days. Search for your medication here.