Patients with nasopharyngeal carcinoma who exhibit vomiting should first determine the cause of the vomiting. For instance, if vomiting is due to the gastrointestinal reactions caused by radiotherapy and chemotherapy, medications such as serotonin receptor antagonists, corticosteroids, and NK-1 receptor blockers should be used to alleviate the side effects of the treatment. Additionally, nasopharyngeal carcinoma patients might experience projectile vomiting due to brain metastasis, which results in increased intracranial pressure. It is essential first to confirm the presence of brain metastasis through CT and MRI scans of the head. If brain metastasis is confirmed, localized treatment such as radiotherapy should be administered. Medications like mannitol and glycerol fructose should be used concurrently to reduce intracranial pressure and relieve the projectile vomiting. (Please use medications under the guidance of a doctor.)