During colonoscopy, your gastroenterologist can tell if you abuse stimulant or herbal laxatives, especially those that contain senna. The condition is called melanosis coli or black colon. The frequent use of stimulant This was melanosis coli in a 75M with a long standing type 2 diabetes and chronic constipation in the form of heavily pigmented mucosa, resembling leopard skin, from the cecum through the ascending Melanosis Coli El Atlas Gastrointestinal gastrointestinalatlas.com PT 141 (10 MG) Sigma Compounds