<p>Darifenacin 7.5 mg once daily; may increase dose to 15 mg once daily if no adequate response after 2 wk of therapy. Darifenacin should be taken with liquid. It can be taken with or without food, and should be swallowed whole and not chewed, divided or crushed.<br />
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For patients with moderate hepatic impairment or when co-administered with potent CYP3A4 inhibitors (e.g., ketoconazole, itraconazole, ritonavir, nelfinavir, clarithromycin and nefazadone), the daily dose of Darifenacin should not exceed 7.5 mg.</p>