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What should I know about ondansetron hydrochloride before taking it?

Before beginning ondansetron hydrochloride treatment, talk to your doctor about all allergies, especially if you have an allergy to medications like dolasetron (Anzemet), palonosetron (Aloxi), or granisetron (Kytril). Tell your doctor if you have the disorder phenylketonuria or long QT syndrome, if you are pregnant, may become pregnant, or breastfeeding. This medication has not been extensively tested in pregnant women, and it remains unclear if the medication can be passed from mother to infant through breast milk. Talk to your doctor about risks and benefits of using this medication. If ondansetron is used with other medications that increase levels of a brain chemical called serotonin, there is a risk of a serious condition called serotonin syndrome. Symptoms of serotonin syndrome include agitation, hallucinations, rapid heart rate, dizziness, tremor, seizures, nausea and vomiting. 

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.