Metyrosine Side Effects

It is possible that some side effects of metyrosine may not have been reported. These can be reported to the FDA here. Always consult a healthcare professional for medical advice.

Applies to metyrosine: oral capsule

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:

More common
  • Diarrhea
  • drooling
  • trembling and shaking of hands and fingers
  • trouble in speaking
Less common
  • Anxiety
  • confusion
  • hallucinations (seeing, hearing, or feeling things that are not there)
  • mental depression
Rare
  • Black, tarry stools
  • blood in urine or stools
  • unusual bleeding or bruising
  • muscle spasms, especially of neck and back
  • painful urination
  • pinpoint red spots on skin
  • restlessness
  • shortness of breath
  • shuffling walk
  • skin rash and itching
  • swelling of feet or lower legs
  • tic-like (jerky) movements of head, face, mouth, and neck
  • unusual tiredness or weakness

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:

More common
  • Drowsiness
Less common
  • Decreased sexual ability in men
  • dryness of mouth
  • nausea, vomiting, or stomach pain
  • stuffy nose
  • swelling of breasts or unusual milk production

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:

More common
  • Diarrhea

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.

Disclaimer: Every effort has been made to ensure that the information provided is accurate, up-to-date and complete, but no guarantee is made to that effect. In addition, the drug information contained herein may be time sensitive and should not be utilized as a reference resource beyond the date hereof. This material does not endorse drugs, diagnose patients, or recommend therapy. This information is a reference resource designed as supplement to, and not a substitute for, the expertise, skill , knowledge, and judgement of healthcare practitioners in patient care. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate safety, effectiveness, or appropriateness for any given patient. Drugs.com does not assume any responsibility for any aspect of healthcare administered with the aid of materials provided. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the substances you are taking, check with your doctor, nurse, or pharmacist.

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