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
- trembling and shaking of hands and fingers
- trouble in speaking
- hallucinations (seeing, hearing, or feeling things that are not there)
- mental depression
- 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
- 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
- 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
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.
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