Ondansetron (UK) 4mg Tablets are a highly effective antiemetic medication used to prevent nausea and vomiting caused by chemotherapy, radiation therapy, or surgery. Each tablet contains 4mg of ondansetron, a serotonin 5-HT3 receptor antagonist that blocks the action of serotonin, reducing nausea and vomiting. These tablets are widely prescribed for their rapid onset of action and excellent tolerability profile, making them a trusted choice for patients undergoing cancer treatment or post-operative care.