Ondansetron Injection is a selective 5-HT3 receptor antagonist used to prevent and treat nausea and vomiting caused by chemotherapy, radiotherapy, surgery, and other medical conditions. It acts by blocking serotonin (5-HT3) receptors in the central nervous system and gastrointestinal tract, thereby providing fast and effective control over emesis. Indications: Chemotherapy-induced nausea and vomiting (CINV) Radiotherapy-induced nausea and vomiting (RINV) Post-operative nausea and vomiting (PONV) Drug-induced nausea and vomiting Acute gastroenteritis-related nausea/vomiting (supportive use) Key Benefits: Fast-acting relief from nausea and vomiting. Highly effective in both acute and delayed CINV/RINV. Safe & well tolerated with minimal side effects. Non-sedating alternative to older antiemetics. Enhances patient compliance during cancer treatment and recovery.