ONSET 4MG 5MG SYRUP 25MLOnset 4mg 5mg Syrup 25ml Info ONSET 4MG 5MG SYRUP 25ML Composition: Contains 4 mg of Ondansetron and 5 mg of another active ingredient per 5 ml (verify packaging for exact formulation). Uses: Used to prevent and treat nausea and vomiting. Effective for nausea caused by chemotherapy, surgery, or gastroenteritis. Benefits: Rapid relief from nausea and vomiting. Oral syrup form is convenient for children and adults. Easy to administer and dose