 <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]  Hemlibra Subcutaneous: This medication is used by people with a certain inherited bleeding problem (hemophilia A) to help prevent or lessen how often you have bleeding problems. Emicizumab belongs to a class of medications known as monoclonal antibodies. It works by helping your blood to clot normally, which helps prevent bleeding due to hemophilia A. Preventing bleeding can lessen symptoms such as painful swellings, joint pain, pain with movement, and difficulty walking far. How to use Hemlibra Vial Read the Medication Guide and Instructions for Use provided by your pharmacist before you start using this medication and each time you get a refill. If you have any questions, ask your doctor or pharmacist. This medication is given by injection under your skin as directed by your doctor, usually once a week for the first 4 weeks, followed by a maintenance dose on a regular schedule as prescribed. The injection is given in the thighs, upper arm, or abdomen (at least 2 inches from your belly button). The dosage is based on your medical condition, weight, and response to treatment. Stop the prophylactic use of bypassing agents the day before starting emicizumab prophylaxis. You may continue proph </s>