The following side effects may get better over time as your body gets used to the medication. Let your healthcare provider know immediately if you continue to experience these symptoms or if they worsen over time.
Common Side Effects
These side effects occurred in at least 10% of people taking the medication:
- Drowsiness
- Drooling
- Difficulty speaking
- Shakiness
- Diarrhea
Less Common Side Effects
- Anxiety
- Depression
- Confusion
- Stuffy nose
- Dry mouth
- Headache
- Enlarged breasts
- Nausea
- Stomach pain
- Difficulty getting or maintaining an erection
- Painful urination
Metyrosine serious side effects
Contact your healthcare provider immediately if you experience any of the following.
- Mental health changes: depression, hallucinations (seeing things that aren't there), confusion
- Extrapyramidal symptoms (EPS): drooling, trouble speaking, tremor, muscle spasms, tightness in your jaw
- Low blood cell counts: feeling tired, paleness, blood in urine or stool, unexplained bruising
- Severe allergic reaction: hives, swelling in the throat, trouble breathing
Source: DailyMed
The following Metyrosine side effects have also been reported
Along with its needed effects, a medicine 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:
Less common
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
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 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
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
Also, after you stop taking this medicine, you may have feelings of increased energy or you may have trouble sleeping. However, these effects should last only for two or three days.
Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.
Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.
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