Common heartburn drug tested as potential lifeline for rare, painful sunlight disorder
Disease control
Completed
This study tested whether cimetidine, a common heartburn medication, could help people with rare genetic disorders (EPP and XLP) that cause severe, painful reactions to sunlight. In this Phase 2 trial, 26 participants took either cimetidine or a placebo for three months to see if…
Phase: PHASE2 • Sponsor: Amy K. Dickey, M.D. • Aim: Disease control
Last updated Mar 24, 2026 12:02 UTC