Ondansetron 4mg is a selective 5-HT3 receptor antagonist that effectively prevents nausea and vomiting. It works by blocking serotonin receptors in the brain and gastrointestinal tract, making it highly useful in controlling both acute and delayed nausea related to multiple causes. Indications: Ondansetron 4mg is indicated for the prevention and treatment of: Chemotherapy-induced nausea and vomiting (CINV) Radiotherapy-induced nausea and vomiting (RINV) Post-operative nausea and vomiting (PONV) Nausea and vomiting due to gastroenteritis and drug-induced causes Key Benefits: Rapid Relief: Quick onset of action against nausea and vomiting. Highly Selective: Specifically blocks serotonin (5-HT3) receptors without affecting dopamine receptors. Versatile Use: Effective in chemotherapy, radiotherapy, post-surgery, and GI-related nausea. Well Tolerated: Minimal sedation and fewer side effects compared to conventional antiemetics. Improves Patient Comfort: Enhances compliance during cancer therapy and recovery phase.