An open follow-up of a controlled study in patients with restless legs synd
rome (RLS) shows that the beneficial effect of pergolide on RLS symptoms pe
rsists throughout at least 1 year. Twenty-two patients of 28 (78.6%) contin
ued to take pergolide. Polysomnographic measurements showed a persistent im
provement of PLM index, PLMS arousal index, total sleep time, and sleep eff
iciency (p = 0.0001). Side effects, in particular nausea, were common but w
ere well controlled by domperidone in most patients.