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Ondansetron Dosing

General Ondansetron Dosage Information

Some considerations for people taking ondansetron include:
  • If you do not take your ondansetron as scheduled, take your next dose as soon as you remember. If it is almost time for your next dose, skip the missed dose and continue with your regular schedule. Do not take a double dose of ondansetron.
  • Your ondansetron dosage can be taken with or without food. If water or food makes you sick to your stomach or you experience nausea after eating or drinking, the orally disintegrating tablets (ODTs) may be especially useful, as they do not require any water (they dissolve in your mouth).
  • For children, the oral solution (liquid) or orally disintegrating tablets (ODTs) may be especially useful. Both are strawberry-flavored.
  • For ondansetron orally disintegrating tablets (ODTs), you should keep each tablet in its original blister pack until you need it. Do not try to push the tablet through the foil (the tablet is delicate and would be crushed). Instead, gently peel the foil away and remove the tablet.
  • The dose of ondansetron is decreased for people who have poor liver function (hepatic function). People with severely impaired liver function should not take more than a total of 8 mg ondansetron each day.
  • For ondansetron to work properly, you have to take it as prescribed. Ondansetron will not work if you take it differently than how your healthcare provider prescribed it.
  • If you are unsure about anything related to ondansetron or your ondansetron dosage, please talk to your doctor, nurse, or pharmacist. Do not stop taking ondansetron without discussing it first with your healthcare provider.
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