Ondansetron injection is a medication used to prevent nausea and vomiting caused by cancer chemotherapy, radiation therapy, and surgery. It belongs to the serotonin 5-HT3 receptor antagonist class, working by blocking serotonin, a natural substance that triggers nausea. Common side effects include headache, dizziness, constipation, and fatigue. Less common but serious effects may involve irregular heart rhythms and allergic reactions. It is typically administered in hospitals under medical supervision, especially for patients undergoing treatments that commonly cause severe nausea and vomiting. Proper dosing and monitoring help minimize side effects and ensure effective symptom control.
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