 <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]  inherited disorder (phenylketonuria-PKU). It helps remove a certain chemical (phenylalanine) from the body. Too much phenylalanine in the body can cause brain damage. How to use Javygtor oral Read the Patient Information Leaflet and Instructions for Use if available from your pharmacist before you start taking sapropterin and each time you get a refill. If you have any questions, ask your doctor or pharmacist. Take this medication by mouth with a meal as directed by your doctor, usually once daily. The dosage is based on your medical condition, age, weight, lab tests, and response to treatment. Open the packet and pour its contents into 120 to 240 milliliters (4 to 8 ounces) of water or apple juice. Stir well until the powder dissolves completely (2 to 3 minutes). Drink all of the mixture within 30 minutes of mixing. You may also mix the powder in a small amount of soft food (such as apple sauce or pudding). Eat all of the mixture right away. Do not prepare a supply in advance. If the dose is less than a full packet, ask your doctor or pharmacist how much water or apple juice you should use to mix with the dose. Mix the entire </s>