Viagra Ingredient Shows Promise for Leigh Syndrome

Researchers from Charité – Universitätsmedizin Berlin discovered that sildenafil significantly improves symptoms in children with Leigh syndrome ^[1]. The study, published March 31, 2026, in the journal Cell, highlights a major breakthrough for this fatal disorder ^[1][2]. Leigh syndrome affects the brain and muscles, often leading to severe disability ^[1]. Patients treated with the active ingredient in Viagra showed dramatic gains in muscle strength ^[1]. Participants also experienced improved mobility during the clinical study ^[2]. These findings suggest a new use for existing medications to treat rare metabolic conditions ^[1][2].