ST. PAUL, MN — March 11, 2002 — Two women with Parkinson's disease who developed alopecia (baldness) while being treated with the dopamine agonists pramipexole or ropinirole found that the hair loss stopped after the drugs were discontinued and replaced with a new treatment.
The study is published in the current issue of Neurology, the scientific journal of the American Academy of Neurology.
Parkinson's disease is a progressive, neurodegenerative disease that may be caused when a small group of brain cells that control body movement die. These cells, the subtantia nigra, normally produce a chemical called dopamine. Loss of dopamine causes the nerve cells to fire out of control, leaving people unable to control their movements normally.
In both cases reported, the women had been started on pramipexole and subsequently switched to ropinirole as dopamine therapy. In the first case, the patient's hair loss stopped within two weeks after she switched to ropinirole. The patient noticed new hair growth one month after switching drugs. After a year of treatment on ropinirole, the alopecia has not returned.
In the second instance, the patient experienced hair loss after being given an increased dosage of pramipexole, which she had been receiving for a year. When her dose was reduced back to previous levels, the hair loss continued. In this case, hair loss continued even after she switched to ropinirole. Ropinirole was finally stopped and she was started on carbidopa/levodopa. Within a week, the hair loss stopped and some of her hair grew back over the next six months.
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