Discontinue treatment if anaphylactic reactions develop; angioedema w/ airway obstruction occur. QT prolongation & Torsades de Pointes in patients w/ risk factors eg, preexisting long QT syndrome & hypokalaemia. Patients w/ significant bladder outflow obstruction; GI obstructive disorders; risk of decreased GI motility; hiatus hernia/gastroesophageal reflux; autonomic neuropathy; neurogenic cause for detrusor overactivity. Assess other causes of frequent urination eg, heart failure or renal disease before treatment. Concomitant use w/ drugs that can cause or exacerbate esophagitis (eg, bisphosphonates); potent CYP3A4 inhibitor eg, ketoconazole. Not to be taken by patients w/ rare hereditary problems of galactose intolerance, Lapp lactase deficiency or glucose-galactose malabsorption. May affect the ability to drive or operate machinery. Severe renal (CrCl ≤30 mL/min) & moderate hepatic impairment (Child-Pugh score 7-9). Pregnancy. Avoid use during lactation. Not to be used in childn.