Ondansetron HCl intravenous injection for chemotherapy-induced and postoperative nausea/vomiting prevention. This selective 5-HT3 receptor antagonist blocks serotonin signaling in the chemoreceptor trigger zone and GI tract. The 20 mL multiple-dose vial contains 2 mg/mL concentration, allowing flexible dosing across multiple patients while reducing waste. Sterile, ready-to-use formulation for immediate clinical administration. Non-returnable sterile product.