 <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]  before injecting tisagenlecleucel. The dosage is based on your medical condition and weight. You should plan to stay for at least 4 weeks near the place of your treatment (for example, within 2 hours' drive). Your doctor will check to see if your treatment is working and help you manage any side effects.The side effects of Kymriah Intravenous: See also Warning section. Headache, tiredness, or loss of appetite may occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly. People using this medication may have serious side effects. However, you have been prescribed this drug because your doctor has judged that the benefit to you is greater than the risk of side effects. Careful monitoring by your doctor may decrease your risk. Although tisagenlecleucel is used to treat cancer, it may rarely increase your risk of developing other cancers. Also, this product may cause a severe decrease in your blood cells, which lowers your ability to fight infections and increases the risk of anemia/bleeding problems. You may be more likely to get a serious (rarely fatal) infection and any infection you have may get worse. Tell your doctor right away if you develop unusual growth </s>