Metyrosine Side Effects

Medically reviewed by Drugs.com. Last updated on Sep 4, 2024.

Applies to metyrosine: oral capsule.

It is important that your doctor check your progress at regular visits to make sure that this medicine is working properly and to check for unwanted effects.

While taking this medicine, it is important that you drink plenty of fluids and urinate often. This will help prevent kidney problems and keep your kidneys working well. If you have any questions about how much you should drink, check with your doctor.

This medicine will add to the effects of alcohol and other CNS depressants (medicines that slow down the nervous system, possibly causing drowsiness). Some examples of CNS depressants are antihistamines or medicine for hay fever, other allergies, or colds; sedatives, tranquilizers, or sleeping medicine; prescription pain medicine or narcotics; barbiturates; medicine for seizures; tricyclic antidepressants (medicine for depression); muscle relaxants; or anesthetics, including some dental anesthetics. Check with your doctor before taking any of the above while you are taking this medicine.

Before having any kind of surgery (including dental surgery), tell the medical doctor or dentist in charge that you are taking this medicine.

This medicine may cause most people to become drowsy or less alert than they are normally. Make sure you know how you react to this medicine before you drive, use machines, or do anything else that could be dangerous if you are not alert.

Serious side effects of metyrosine

Along with its needed effects, metyrosine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor as soon as possible if any of the following side effects occur while taking metyrosine:

Other side effects of metyrosine

Some side effects of metyrosine may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.

Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

After you stop using this medicine, it may still produce some side effects that need attention. During this period of time, Check with your doctor immediately if you notice the following side effects:

Also, after you Stop taking metyrosine, you may have feelings of increased energy or you may have trouble sleeping. However, these effects should last only for two or three days.

See also:

Further information

Metyrosine side effects can vary depending on the individual. Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Note: Medication side effects may be underreported. If you are experiencing side effects that are not listed, submit a report to the FDA by following this guide.

Medical Disclaimer