Restless Legs Syndrome and Periodic Limb Movements

Area of Science:

• Neurology
• Sleep Medicine
• Pharmacology

Background:

• Restless Legs Syndrome (RLS) is a neurological disorder characterized by an urge to move the limbs.
• Periodic Limb Movements (PLM) are often associated with RLS.
• RLS augmentation, a worsening of symptoms with treatment, is a significant concern.

Purpose of the Study:

• To outline the diagnostic criteria for RLS and PLM.
• To discuss the pathophysiology and management strategies for RLS.
• To review approaches for addressing RLS augmentation.

Main Methods:

• Review of current RLS diagnostic criteria.
• Analysis of recent treatment guideline changes from the American Academy of Sleep Medicine (AASM).
• Evaluation of evidence for various therapeutic interventions, including IV iron, nerve stimulation, and pharmacologic agents.

Main Results:

• Dopamine agonists are downgraded as first-line therapy for RLS due to augmentation.
• α2δ calcium channel ligands are now the mainstay of pharmacologic treatment for RLS.
• IV iron therapy, particularly ferric carboxymaltose, requires careful monitoring for hypophosphatemia.
• Bilateral peroneal nerve stimulation shows efficacy as an adjunct therapy for refractory RLS.
• Opioids maintain a role in RLS treatment, with reassuring data from the National RLS Opioid Registry.

Conclusions:

• Current RLS management emphasizes α2δ calcium channel ligands over dopamine agonists.
• Optimizing IV iron therapy and considering adjuncts like nerve stimulation are key in managing RLS.
• Understanding and addressing RLS augmentation is critical for long-term patient care.