Eumine refers to Tolansetron Hydrochloride for Injection, an antitumor adjuvant. It is used clinically for the prevention and treatment of nausea and vomiting induced by cancer chemotherapy and also for post-surgical nausea and vomiting. Tolansetron Hydrochloride for Injection is a highly selective 5-hydroxytryptamine 3 (5-HT3) receptor antagonist. It has a dual action; in addition to selectively blocking 5-HT3 receptors in peripheral neurons, it also inhibits vagal excitation in the polar posterior region by directly blocking central 5-HT3 receptors. Patients may experience adverse reactions after use including headache, dizziness, vertigo, fatigue and gastrointestinal disturbances such as abdominal pain and diarrhea. If symptoms are not relieved, prompt hospitalization should be sought. Tolansetron hydrochloride is contraindicated in people who have allergy to it. Because the common adverse effects of Tolansetron Hydrochloride are dizziness and fatigue, patients should avoid driving or maneuvering machinery, etc. after taking the drug. Do not use the drug when its properties change, such as foreign objects in the bottle and color change. The above drugs need to be used under the guidance of a doctor, do not use them on your own to avoid delays.