Restless Leg Syndrome (Investigational)

Краткая информация для пациента

Есть ли FDA-допуск для этого показания?

Not FDA-cleared for restless leg syndrome. FDA cleared medicinal leeches only for venous congestion in microsurgical reconstruction (K040187, 2004). Use for RLS is investigational.

Какие доказательства существуют?

Tier C (investigational). Only small case reports of subjective improvement; there are no randomized controlled trials. Evidence-based RLS care per AAN 2016 guidelines starts with iron status optimization (target ferritin above 75 ng/mL, transferrin saturation above 20 percent), avoidance of provoking medications (most antihistamines, many antidepressants, dopamine antagonists), and pharmacotherapy with alpha-2-delta ligands (gabapentin enacarbil, pregabalin) or, with caution about long-term augmentation, dopamine agonists.

Основные риски

• Bleeding from bite sites for 6 to 24 hours after detachment
• Bruising and tenderness over the calves for 5 to 10 days
• Temporary worsening of RLS symptoms for 1 to 3 nights
• Local skin infection or, rarely, Aeromonas infection
• Allergic reaction to leech saliva (uncommon)
• Small permanent scars at bite sites
• Delay or replacement of evidence-based iron repletion and pharmacotherapy

Кому не следует это рассматривать

• Patients with secondary RLS from end-stage renal disease, pregnancy, or iron deficiency without first addressing the cause
• Patients experiencing augmentation from dopamine agonists (require medication review first)
• Patients on anticoagulants or who have hemophilia or other bleeding disorders
• Patients with severe anemia (Hb under 10 g/dL) or active infection
• Patients with active peripheral neuropathy or vascular insufficiency
• Patients who have not tried iron repletion or first-line medications

О чём спросить врача

• Has my ferritin been tested, and is it above 75 ng/mL? Have I had a trial of iron supplementation?
• What is my International Restless Leg Syndrome Study Group score?
• Have I been screened for medications or substances that worsen RLS (some antidepressants, antihistamines, neuroleptics, caffeine, alcohol)?
• Have I tried alpha-2-delta ligands (gabapentin enacarbil or pregabalin)?
• If I am on a dopamine agonist, am I experiencing augmentation, and is rotation appropriate?
• What evidence supports leech therapy for RLS specifically?
• What is the practitioner's experience and Aeromonas-prevention plan?

Когда срочно обратиться за медицинской помощью

• New severe leg weakness, numbness, or loss of bladder/bowel control (cauda equina — call 911)
• Sudden severe leg pain, pallor, or coldness (acute limb ischemia)
• New unilateral leg swelling, redness, and pain (possible DVT)
• Spreading redness, warmth, pus, or red streaks at a bite site
• Bleeding from a bite site lasting more than 24 to 48 hours
• Fever above 38.0 C / 100.4 F or chills
• Hives, throat tightness, or breathing difficulty