Precautions

Drug information provided by: IBM Micromedex

It is very important that your doctor check your or your child's progress at regular visits to make sure this medicine is working properly. Blood and urine tests may be needed to check for unwanted effects.

Check with your doctor right away if blurred vision, difficulty seeing at night, sensitivity of the eyes to sunlight, or any other changes in vision occur during or after treatment. Your doctor may want your eyes be checked by an ophthalmologist (eye doctor).

This medicine may also cause a delay in intellectual ability and growth development. Check with your doctor if you or your child has problems in intelligence, short-term memory, learning ability, and attention, or if your child has slower growth than normal.

Nitisinone can temporarily lower the number of white blood cells in your blood, increasing the chance of getting an infection. It can also lower the number of platelets, which are necessary for proper blood clotting. Avoid people with infections and check with your doctor if you have symptoms of an infection, such as fever or chills, cough or hoarseness, lower back or side pain, or painful or difficult urination. Call your doctor if you have any unusual bleeding or bruising, black, tarry stools, blood in the urine or stools, or pinpoint red spots on your skin.

The oral suspension contains glycerol and may cause diarrhea, an upset stomach, or headaches. Let your doctor know if you have these symptoms.