 <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]  given by injection into a vein by a health care professional as directed by your doctor. The infusion of this medication is usually finished about 30 minutes before the start of chemotherapy. Your doctor may also direct you to take a form of this medication given by mouth (aprepitant) for the next 2 days. Follow your doctor's instructions carefully. Children's dosage is based on weight and age. If you have any questions, ask your doctor or pharmacist. Fosaprepitant may rarely cause severe allergic reactions (such as flushing, redness, or trouble breathing) while it is being given. Your doctor may decide to stop the infusion if this happens. Tell your healthcare professional right away if you have any of symptoms of a severe allergic reaction during your infusion. If the infusion is stopped, do not use fosaprepitant again. Tell your doctor if you vomit or feel nauseated.The side effects of Emend (Fosaprepitant) Intravenous: See also How to Use section. Tiredness or hiccups may occur. If either of these effects lasts or gets worse, tell your doctor or pharmacist promptly. Remember that this medication has been prescribed because your doctor has judged that the benefit to you is greater than the </s>