Clinical Efficacy of Leech Therapy (Ta'liq al-'Alaq) in Eczema (Nar Farsi): An Open-Label Single-Arm Clinical Study
Ulla P BS, Aaisha B, Bokhari S, Zabiulla P, Alam MA, Nikhat S (2025) · Alternative Therapies in Health and Medicine · n=20
Perfil del estudio
- Diseño
- single-center, open-label, single-arm clinical study of leech therapy for eczema in the Unani medicine tradition (India)
- Tamaño de la muestra (n)
- 20
- Intervención
- Four sessions of leech therapy with one-week intervals; standardized Ta'liq al-'Alaq (leech therapy) protocol per Unani medicine practice
- Comparador
- Within-subject pre/post comparison using standardized Eczema Area and Severity Index (EASI) - no randomized control arm
- Punto final primario
- Eczema Area and Severity Index (EASI) score - components for redness, edema, excoriation, lichenification, and total area
- Resultado primario
- Statistically significant improvement in eczema severity: redness (p=0.0001), edema (p=0.0001), excoriation (p=0.0022), lichenification (p=0.0001); total area involved did not show statistically significant decrease (p=0.24); all 20 patients completed the trial with no dropouts
- Duración del seguimiento
- 4 weekly sessions (~28 days)
- PMID
- 40293844
Hallazgos clave
- First PubMed-indexed Unani medicine clinical trial of leech therapy for eczema (Nar Farsi)
- Significant within-subject improvements in three of four EASI components (redness, edema, excoriation, lichenification)
- Total skin area involvement did not significantly decrease - suggests symptomatic improvement without disease-modifying area reduction
- 100% completion rate (no dropouts) signals patient acceptability of multi-session leech protocol
- Provides hypothesis-generating signal for leech therapy in inflammatory dermatologic conditions
Limitaciones
- Single-arm design with no randomized control - entire effect could reflect natural fluctuation, placebo, or attention
- Small sample (n=20)
- Open-label evaluation by treating clinicians who knew the intervention
- Single Unani medicine institution - selection bias toward CAM-favorable patient population
- Eczema is a relapsing-remitting condition - 4-week follow-up cannot assess durability
Implicaciones clínicas
Ulla 2025 is the only PubMed-indexed Unani-medicine clinical study of leech therapy for eczema and provides exploratory evidence that leech application may improve inflammatory eczema parameters. The single-arm uncontrolled design limits causal inference, and the lack of total-area improvement suggests symptomatic-only effect. For ASH editorial purposes, this study is cited only as preliminary cross-cultural evidence; it does not support routine use in eczema. The trial illustrates the broader Unani medicine application of leech therapy across dermatologic indications - a use case largely absent from the Western evidence base.
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