Nitisinone is used to treat a certain inherited disorder (hereditary tyrosinemia type 1, also known as HT-1). HT-1 is usually discovered in infants and needs lifelong treatment. This condition is caused by a shortage of a certain natural substance that is needed to break down a nutrient (tyrosine) found in food. This effect causes a build-up of too much tyrosine and related substances in the liver. Nitisinone works by helping to prevent the formation and build-up of several toxic substances that cause damage to the liver, kidneys, and nervous system. This drug must be used along with a diet low in protein, tyrosine, and phenylalanine.

How to use

Take this medication by mouth as directed by your doctor, usually twice daily.

If you are taking the capsules, take them on an empty stomach at least 1 hour before or 2 hours after a meal. If you are unable to swallow the capsules and/or have side effects with the suspension, you may open up the capsules and mix the contents in a small amount of water, formula, or apple sauce immediately before use.

If you are taking the suspension, read the Patient Information Leaflet provided by your pharmacist before you start taking it and each time you get a refill. If you have any questions, ask your doctor or pharmacist. Shake the bottle well before each dose. Carefully measure the dose using a special measuring device/spoon. Do not use a household spoon because you may not get the correct dose. You may take the suspension with or without food. When using an unopened bottle of suspension for the first time, remove it from the refrigerator and let it warm to room temperature for 30 to 60 minutes before use.

If you are taking the tablets, read the Patient Information Leaflet if available from your pharmacist before you start taking nitisinone and each time you get a refill. You may take the tablets with or without food. If you are unable to swallow the tablets, you may crush the tablets and mix them in a small amount of water or applesauce. Take the mixture right away. If you are using a special measuring device/syringe to prepare and give the tablets mixed with water, carefully follow the directions from the manufacturer. Ask your doctor or pharmacist if you have any questions.

The dosage is based on your medical condition, weight, and response to treatment. Your doctor may adjust your dose and schedule based on your response to treatment. Carefully follow your doctor's directions for taking this medication.

Take this medication regularly to get the most benefit from it. To help you remember, take it at the same time(s) each day.

It is very important that patients taking this medication follow a special diet low in protein, tyrosine, and phenylalanine. Consult your doctor, pharmacist, or dietician for more details. (See also Drug Interactions and Precautions sections.

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CONDITIONS OF USE: The information in this database is intended to supplement, not substitute for, the expertise and judgment of healthcare professionals. The information is not intended to cover all possible uses, directions, precautions, drug interactions or adverse effects, nor should it be construed to indicate that use of a particular drug is safe, appropriate or effective for you or anyone else. A healthcare professional should be consulted before taking any drug, changing any diet or commencing or discontinuing any course of treatment.