Demser Side Effects

Generic Name: metyrosine

Note: This page contains information about the side effects of metyrosine. Some of the dosage forms included on this document may not apply to the brand name Demser.

Not all side effects for Demser may be reported. You should always consult a doctor or healthcare professional for medical advice. Side effects can be reported to the FDA here.

Applies to metyrosine: oral capsule

In addition to its needed effects, some unwanted effects may be caused by metyrosine (the active ingredient contained in Demser). In the event that any of these side effects do occur, they may require medical attention.

If any of the following side effects occur while taking metyrosine, check with your doctor or nurse as soon as possible:

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 of the side effects that can occur with metyrosine may not need medical attention. As your body adjusts to the medicine during treatment these side effects may go away. Your health care professional may also be able to tell you about ways to reduce or prevent some of these side effects. If any of the following side effects continue, are bothersome or if you have any questions about them, check with your health care professional:

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 taking this drug, it is possible that you may still experience side effects that need medical attention. If you notice any of the following side effects check with your doctor immediately:

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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