What happens if I miss a dose?
If you miss a dose of this medicine, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not take a double dose of the medicine to make up for a missed dose.
What other drugs will affect Zofran?
Zofran can cause a serious heart problem, especially if you use certain medicines at the same time, including antibiotics, antidepressants, heart rhythm medicine, antipsychotic medicines, and medicines to treat cancer, malaria, HIV (Human Immunodeficiency Virus) or AIDS. Tell your doctor about all medicines you use, and those you start or stop using during your treatment.
How long before a meal should you take ondansetron?
If you are taking ondansetron Zofran to treat nausea associated with meals, the standard tablet should be taken half an hour to 1 hour before meals.
How long does ondansetron take to work?
Oral ondansetron (Zofran) works quickly, usually within 30 minutes, but it may take up to two hours for the full effect. This medication is usually taken 30 minutes before chemotherapy, 1 hour before surgery, or 1 to 2 hours before radiation treatments, to help prevent nausea and vomiting.
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