Parkinsonian symptoms can sometimes occur as side effects of certain medications that may be prescribed for bipolar disorder. When these symptoms are caused by a medication, the condition is called secondary parkinsonism. The symptoms include:
- Slow movement
- Difficulty maintaining balance and walking
- Stiff muscles
- Soft voice
- Decrease in facial expressions
Secondary parkinsonism caused by antipsychotics is generally treated with prescription drugs, including Cogentin (benztropine) and Symmetrel (amantadine). A change in your bipolar medications may ultimately be required.
Secondary Parkinsonism. Medline Plus. US National Library of Medicine and National Institutes of Health. 4 July 2009. 27 Feb 2010.
Parkinsonism. The Merck Manuals. Aug 2007. 27 Feb 2010.