Informational only — Not medical advice. Always consult a licensed healthcare provider.

Community data Updated 2 months ago

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Other brands with the same active ingredient

These brands contain the same active ingredient (Darifenacin). Strength and form may differ — confirm substitution with your doctor or pharmacist before switching.

Available as: 7.5 mg

Indications & Uses

Darifen ER is used to treat overactive bladder, helping relieve symptoms such as urgent, frequent, and sometimes uncontrollable urges to urinate.

Dosage Reference

Reference Information Only

Dosages shown are general references from official sources. Always consult your doctor or pharmacist for personalized dosing.

Adults:

Darifenacin 7.5 mg once daily; the dose may be increased to 15 mg once daily if the response is not adequate after 2 weeks of therapy. Darifenacin should be taken with liquid. It can be taken with or without food, and should be swallowed whole rather than chewed, divided or crushed. For patients with moderate hepatic impairment, or when co-administered with potent CYP3A4 inhibitors such as ketoconazole, itraconazole, ritonavir, nelfinavir, clarithromycin and nefazodone, the daily dose of Darifenacin should not exceed 7.5 mg.

Side Effects

Dry mouth and constipation are the most common side effects experienced with this medicine. Other, less frequent side effects that have been reported include blurred or abnormal vision, back pain, dry skin, raised blood pressure, vomiting, swelling of the extremities (peripheral edema), weight gain, joint pain, bronchitis, sore throat, runny or stuffy nose, sinusitis, skin rash, itching, urinary tract disorders, and vaginitis.

Cautions & Contraindications

Warnings & Precautions

Darifen ER should be used cautiously in patients who are prone to urinary retention or reduced gastrointestinal motility, as well as in those with impaired kidney or liver function.

Contraindications

Patients with urinary retention or gastric retention, and those with uncontrolled narrow-angle glaucoma, should not use this medicine. It is also not recommended for patients who are at risk of developing these conditions.

Drug Interactions

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Moderate Itraconazole
Moderate Nelfinavir
Moderate Ritonavir
Moderate Ketoconazole
Last updated: 15 Aug 2026