Adults:Ondansetron Kalceks 2 mg/ml is indicated for the management of nausea and vomiting induced by cytotoxic chemotherapy and radiotherapy. Ondansetron Kalceks 2 mg/ml is indicated for the prevention and treatment of post-operative nausea and vomiting (PONV). Paediatric Population: Ondansetron Kalceks 2 mg/ml is indicated for the management of chemotherapy-induced nausea and vomiting (CINV) in children aged ≥6 months, and for the prevention and treatment of PONV in children aged ≥ 1 month.