A 19-year-old female asked:
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how many mg of zofran (ondansetron) should one take & how often, for a stomach bug, if they already take 8mg at least 3x a week for severe nausea caused by anxiety?

1 doctor answer
Dr. Rebecca Gliksman
37 years experience Internal Medicine
Zofran (ondansetron): http://www.rxlist.com/zofran-drug/indications-dosage.htm Dose for chemotherapy , the initial indication is 8 mg 2 x a day. Rarely up to 24 mg /day . It has a large therapeutic index(can be tolerated ) . Not recommended for nausea due to anxiety or long term use. Caution if used with SSRIs and apomorphine. F/u w/ doc there are other meds for anxiety and can cause serotonin syndrome.
Answered on Jul 1, 2016
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1 comment
Dr. Rebecca Gliksman
37 years experience Internal Medicine
Provided original answer
Can also rarely cause prolonged QT interval f/u w/ doc
Jul 1, 2016

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