 <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] ), then swallow it with saliva or with liquid. You do not need to take this product with liquid. If your dose is for more than one film, allow each film to dissolve completely before taking the next film. Wash your hands after taking this medication. To prevent nausea from chemotherapy, take this medication as directed by your doctor, usually 30 minutes before treatment begins. To prevent nausea from radiation treatment, take this medication 1 to 2 hours before the start of your treatment. To prevent nausea after surgery, take ondansetron 1 hour before the start of surgery. Carefully follow your doctor's directions for taking this medication. Ondansetron may be taken up to 3 times a day for 1 to 2 days after each chemotherapy or radiation treatment. If you are taking this medication on a prescribed schedule, take it regularly in order to get the most benefit from it. To help you remember, take it at the same times each day. The dosage is based on your medical condition and response to treatment. The dosage for children may also be based on age and weight. Take this medication exactly as directed. Do not take more medication or take it more often than prescribed. Tell your doctor if your nausea and vomiting lasts or if it gets worse.The side effects of </s>