Navoban is a medication used to prevent nausea and vomiting resulting from chemotherapy and radiotherapy. It contains tropestrone, which works to disrupt nerve signals responsible for stimulating the vomiting center in the brain. Navoban is characterized by its long-acting effect, making it suitable for controlling symptoms that appear long after treatment sessions. This medication is given by intravenous injection at a dose determined by the doctor according to the type and severity of treatment. Navoban may also cause some side effects such as constipation and headache, and rarely, it may affect the heart rate. Therefore, it should be used under medical supervision, and the dose should not be repeated without consulting a doctor.