Vomiren 0.5 mg Tablet is an antiemetic medication containing Palonosetron Hydrochloride, a selective serotonin 5-HT₃ receptor antagonist. It is primarily used to prevent and treat nausea and vomiting associated with chemotherapy, radiotherapy, and postoperative recovery. Palonosetron works by inhibiting the action of serotonin, a natural substance that can trigger nausea and vomiting, thereby providing relief to patients undergoing treatments that may cause these symptoms.