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Symmetrel / Amantadine Side Effects

Bipolar Medications Library

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Updated June 19, 2006

Symmetrel is a dual action medication. It is an antiviral that also can treat the stiffness and shaking of Parkinson's disease that can also be caused by some psychiatric drugs. Thus it is also classed as an antidyskinetic medication.

Common Symmetrel Side Effects:

Check with your doctor if any of the following side effects continue or are bothersome:

Difficulty concentrating; dizziness or lightheadedness; headache; irritability; loss of appetite; nausea; nervousness; purplish red, net-like, blotchy spots on skin; trouble in sleeping or nightmares

Less Common Symmetrel Side Effects:

Check with your doctor if any of the following side effects continue or are bothersome:

Constipation; dryness of the mouth, nose, and throat; vomiting

Always Notify Doctor:

Less common: Blurred vision; confusion (especially in elderly patients); difficult urination (especially in elderly patients); fainting; hallucinations (seeing, hearing, or feeling things that are not there)

Rare: Convulsions (seizures); decreased vision or any change in vision; difficulty in coordination; irritation and swelling of the eye; mental depression; skin rash; swelling of feet or lower legs; unexplained shortness of breath

Other side effects not listed above may also occur in some patients. If you notice any other effects, check with your doctor.

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