TOVIAZ should also not be used in patients with: • urinary retention (difficulty in passing urine), • gastric retention (when the stomach does not empty properly), • uncontrolled narrow-angle glaucoma (increased eye pressure even with treatment), • myasthenia gravis (a disease of the nerves causing muscle weakness), • severe hepatic impairment (severe liver disease), • severe ulcerative colitis (severe inflammation of the large intestine causing ulceration and bleeding), • toxic megacolon (a very serious complication of colitis).