Ondansetron (Zofran)
$0.34
Zofran contains Ondansetron and prevents nausea and vomiting caused by chemotherapy, radiotherapy or surgery.
Drug Information
9 reviews for Ondansetron (Zofran)
Zofran contains Ondansetron.
Ondansetron is a medicine that prevents nausea and vomiting caused by chemotherapy, radiotherapy and surgery. It is one of the most effective anti-sickness medicines.
What is it used for?
- Preventing nausea and vomiting from chemotherapy
- Preventing nausea and vomiting from radiotherapy
- Preventing and treating nausea after surgery
How does it work?
Chemotherapy and radiotherapy release serotonin in the gut, which sends vomiting signals to the brain. Ondansetron blocks serotonin (5-HT3) receptors, stopping these signals.
This information is written in simple words to help you understand this product. It does not replace advice from your doctor or pharmacist.
Read these points before you start. If any of them apply to you, talk to your doctor or pharmacist first.
- Tell your doctor if you have a heart rhythm problem (long QT), low potassium or magnesium, or take other medicines that affect heart rhythm.
- Tell your doctor if you have liver problems or a blocked bowel.
- Taking it with other serotonin medicines (such as SSRIs) can rarely cause serotonin syndrome.
- Tell your doctor if you are pregnant, especially in the first 3 months.
- Tell your doctor or pharmacist about every other medicine, vitamin or herbal product you use.
- Keep this product out of the reach and sight of children.
Like all medicines, Zofran can cause side effects, but not everybody gets them.
Common side effects
- Headache
- Constipation
- Feeling warm or flushed
- Tiredness
These are usually mild and often get better as your body gets used to it. Tell your doctor if they bother you or do not go away.
Stop using it and get medical help straight away if you notice:
- A fast or uneven heartbeat, or fainting
- Blurred vision or temporary loss of sight
- Fever, sweating, shaking and confusion (serotonin syndrome)
- Signs of an allergic reaction
This is not a complete list. If you notice anything unusual, ask your doctor or pharmacist.
- Take it exactly as your doctor tells you. For chemotherapy, the first dose is often taken 1 to 2 hours before treatment.
- A common adult dose is 8 mg twice a day.
- Swallow the tablet with water, or let the melt tablet dissolve on your tongue.
If you miss a dose: Take it as soon as you remember if you feel sick. Never take two doses at once.
If you use too much: Contact your doctor, a poison control centre or your local emergency number straight away, even if you feel fine. Take the pack with you.
How to store it: Keep it in its original pack at room temperature (below 25°C / 77°F), away from heat, damp and direct sunlight. Do not use it after the expiry date.
- QCan Zofran cause constipation?
- A
Yes. Drinking water, eating fibre and staying active helps.
- QCan I take Zofran for stomach bugs?
- A
It is sometimes used, but ask your doctor first.
- QWhen should I take Zofran before chemotherapy?
- A
Usually 1 to 2 hours before. Follow your care team's instructions.

Neel Ahmed –
I tried this site for Zofran after checking a couple of other places. I had a quick question and the support team replied fast.
Carolina Ivanov –
I have ordered from here before and it went well again. The Zofran I received was exactly what I ordered. Plus, prices here are easy on the pocket. I am glad I tried this site.
Faisal Kowalski –
The parcel arrived a day or two sooner than I figured. Besides that, they answered my email within a day. Everything went well, so I will be back.
Riya Das –
Customer service was polite and helpful. The Ondansetron I ordered came in a reasonable amount of time. Easy to deal with, which is what I wanted.
Rafael Romano –
Support was friendly and cleared up my doubt quickly. No delays at all with shipping. Thank you, I will be ordering again.
Amara Keller –
Tried this site for the first time and had a good experience. The customer team was respectful and answered everything I asked.
Jack Marino –
This was my second order from the site. No complaints about the product. I paid less for Zofran here than I have elsewhere.
Jack Schmidt –
I just received my order and wanted to leave a quick note. My Zofran was packed with care, which I really noticed. Plus, browsing the site was pleasant and the search worked well. All good on my side!
Jin Morales –
The layout makes it easy to find what you are after. My Zofran came well wrapped and in perfect condition. No problems at all, so I am pleased.