Melatonin and Restless Leg Syndrome

Introduction to Melatonin and RLS

• The American Academy of Sleep Medicine recommends immediate-release melatonin as a treatment option for REM Sleep Behavior Disorder, with no mention of RLS exacerbation as a concern 1

Medications That Exacerbate RLS

• The American Geriatrics Society identifies tricyclic antidepressants, SSRIs, lithium, and dopamine antagonists (antipsychotics) as medications that worsen RLS symptoms 2
• The American Geriatrics Society notes that melatonin is not listed as a medication that exacerbates RLS symptoms 2, 3, 4

Clinical Context and Mechanism

• The pathophysiology of RLS involves dopaminergic dysfunction and iron deficiency in the substantia nigra, while melatonin operates through different mechanisms and does not interfere with dopaminergic pathways in ways that would exacerbate RLS 1, 2, 3

Practical Recommendations

• The American Academy of Sleep Medicine suggests that melatonin can be safely used in patients with RLS for sleep-related issues without concern for symptom exacerbation 1
• The American Geriatrics Society recommends avoiding documented RLS-exacerbating medications, such as antidepressants, antipsychotics, antihistamines, and lithium, and addressing modifiable factors that worsen RLS, including caffeine intake, alcohol use, iron deficiency, and untreated obstructive sleep apnea 2, 5