Ulcerative colitis is a chronic inflammatory autoimmune disease affecting the colon. The World Health Organization has classified it as a relatively new treatment-resistant disease, and its prevalence has reportedly increased significantly in Egypt. A preclinical study was conducted to evaluate desloratadine as a potential therapeutic agent for ulcerative colitis, based on its known anti-inflammatory and antioxidant properties. The study concluded that desloratadine effectively alleviated experimental ulcerative colitis. This positive effect is attributed to its anti-inflammatory and antioxidant properties, which work by regulating mast cell activity and inhibiting histamine release.