Iron for restless legs syndrome.

Area of Science:

• Neurology
• Pharmacology
• Internal Medicine

Background:

• Restless legs syndrome (RLS) is a prevalent neurological disorder frequently linked to iron deficiency.
• The efficacy of iron therapy as a treatment for RLS remains uncertain.

Purpose of the Study:

• To evaluate the effectiveness of oral or intravenous iron supplementation in patients diagnosed with RLS.

Main Methods:

• Systematic review of controlled trials comparing iron formulations against placebo, other medications, or no treatment.
• Searched multiple databases (CENTRAL, MEDLINE, EMBASE, PsycINFO, CINAHL) from January 1995 to April 2011.
• Data extraction and quality assessment performed by multiple reviewers; trial authors contacted for additional data.

Main Results:

• Six studies with 192 participants were analyzed; trial quality varied.
• Meta-analysis of four trials using the IRLS severity scale showed no significant benefit of iron therapy (p=0.06).
• One trial reported benefit, while quality of life improvements were inconsistent; no differences in periodic limb movements, sleep quality, or daytime functioning were observed.
• Iron therapy did not significantly increase side effects compared to placebo.

Conclusions:

• Current evidence is insufficient to confirm the benefit of iron therapy for RLS treatment.
• Further research is required to identify specific RLS patient subgroups who may respond to iron therapy and to determine optimal administration routes.