 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST]  no longer needed. Consult your pharmacist or local waste disposal company.The uses of Granisetron HCl Intravenous: This medication is used alone or with other medications to prevent nausea and vomiting caused by cancer drug treatment (chemotherapy). It is also used to prevent and treat nausea and vomiting after surgery in adults.Granisetron works by blocking one of the body's natural substances (serotonin) that can cause vomiting. How to use Granisetron Hcl Vial Read the Patient Information Leaflet if available from your pharmacist before you start using granisetron and each time you get a refill. If you have any questions, ask your doctor or pharmacist. This drug is given into a vein as directed by your doctor, usually 30 minutes before cancer chemotherapy or before/during/after surgery. The drug may be given directly into a vein over 30 seconds, or it may be mixed in an IV fluid and given into a vein over a longer time (5 minutes). If you are giving this medication to yourself at home, learn all preparation and usage instructions from your health care professional. Before using, check this product visually for particles or discoloration. If either is present, do not use the liquid. Learn </s>