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Abstract
Restless legs syndrome (RLS) is a common neurologic disorder that affects 5 to 10% of the population and increases in prevalence with aging. The clinical hallmarks of RLS include dysesthesias or paresthesias in the legs and sometimes the arms, occurring primarily at rest, which are usually worse in the evening and are alleviated by movement. RLS can be a disabling disorder, causing sleep disturbance at night and excessive sleepiness during the day. Although treatment with levodopa alleviates symptoms, many RLS patients develop rebound (occurrence of symptoms during the night) or augmentation (occurrence of symptoms before levodopa dosing in the evening). Augmentation occurs in up to 82% of patients treated with levodopa, limiting the long-term usefulness of this agent. The direct dopamine receptor agonists are long-acting drugs often administered as a single dose at bedtime. Among these agents, pergolide, pramipexole, ropinirole, and cabergoline have all been shown to alleviate RLS symptoms in 70 to 100% of patients. The most common adverse effect is nausea. Augmentation, although it may be associated with chronic agonist use, is usually mild and responsive to additional dosing. The direct dopamine receptor agonists have largely replaced levodopa as the most effective treatment for RLS.
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