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Are you Looking to Buy Zofran (Ondansetron) from OnlineCanadianPharmacy.

We don't sell this brand-version medication.

( Affordable Generic Alternatives )

Buy Generic Ondansetron

Prescription Prescription Required
Formulation : Tablet
Drug Name Dosage Quantity Price Buy Now
Ondansetron 8mg 10 $159.58 Add To Cart
Ondansetron 8mg 60 $305.01 Add To Cart
Dosage: 8mg
Quantity: 10
Price: $159.58
Dosage: 8mg
Quantity: 60
Price: $305.01


  • Medication used alone or with other drugs to prevent nausea and vomiting from chemotherapy and radiation therapy for cancer.
  • Also used to prevent and treat nausea and vomiting after surgery.
  • Blocks serotonin, a natural substance in the body that triggers vomiting.

Dosage and administration

  • Take medication for chemotherapy-related nausea 30 minutes before treatment, for radiation treatment 1-2 hours before, and for surgery 1 hour before.
  • May be taken with or without food but follow doctor’s advice on eating before treatment.
  • Use a special measuring device for the liquid form, not a household spoon.
  • Follow doctor’s directions for additional doses, up to 3 times a day for 1-2 days post-treatment.
  • Take regularly on a prescribed schedule for maximum benefit.
  • Dosage depends on medical condition, response to therapy, and for children, may be based on age and weight.
  • Maximum dose for severe liver problems is 8 milligrams in 24 hours.
  • Take exactly as directed; do not exceed prescribed dosage or frequency.
  • Inform the doctor if the condition does not improve or worsens.

Side effects

  • Possible side effects: headache, lightheadedness, dizziness, drowsiness, tiredness, constipation.
  • If effects persist or worsen, inform the doctor..
  • To reduce dizziness and lightheadedness, rise slowly from sitting or lying position.
  • Medication prescribed considering benefits outweigh risks.
  • Serious side effects: stomach pain, muscle spasm/stiffness, vision changes.
  • Very serious side effects: chest pain, irregular heartbeat, severe dizziness, fainting.
  • Risk of serotonin syndrome; inform doctor of all medications.
  • Symptoms of serotonin syndrome: fast heartbeat, hallucinations, loss of coordination, severe dizziness, severe nausea/vomiting/diarrhea, twitching muscles, unexplained fever, unusual agitation/restlessness.
  • Rare but serious allergic reaction; seek medical help for symptoms like rash, itching/swelling, severe dizziness, trouble breathing.
  • Not a complete list of side effects; contact doctor/pharmacist for other effects.


  • Inform doctor/pharmacist of allergies to ondansetron or serotonin blockers.
  • Check for inactive ingredients that may cause allergic reactions.
  • Share medical history, especially irregular heartbeat, liver disease, stomach/intestinal issues.
  • Ondansetron may cause QT prolongation, leading to serious/fast/irregular heartbeat.
  • Risk may increase with certain medical conditions or drugs; disclose all medications and relevant conditions.
  • Low potassium/magnesium levels may elevate QT prolongation risk; discuss use of ondansetron with the doctor.
  • Medication can cause dizziness or drowsiness; avoid alcohol/marijuana, be cautious with activities requiring alertness.
  • Older adults may be more sensitive to side effects, particularly QT prolongation.
  • Use during pregnancy only if necessary; discuss risks and benefits with the doctor.
  • Unknown if the drug passes into breast milk; consult doctor before breastfeeding.


Additional information

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Quantities Available:

10, 60



All product content included on is for information only. Please note that it is not a replacement for your individual professional medical care or advice. Always remember to speak with a qualified health professional before taking any prescription or non prescription medication.

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