Do not take Emselex: • if you are allergic (hypersensitive) to darifenacin or any of the other ingredients of Emselex. • if you suffer from urinary retention (inability to empty your bladder). • if you have gastric retention (problems emptying the contents of the stomach). • if you suffer from uncontrolled narrow-angle glaucoma (high pressure in the eyes with loss of eyesight that is not being adequately treated). • if you have myasthenia gravis (a disease marked by abnormal fatigue and weakness of selected muscles). • if you have severe ulcerative colitis or toxic megacolon (acute dilation of the colon associated with amoebic or ulcerative colitis). • if you have severe liver problems. • There are some medicines such as ciclosporin, verapamil, antifungal medicines (e. g. ketoconazole and itraconazole) and some antiviral medicines (e. g. ritonavir) that must not be taken with Emselex.