What Is Darifenacin XR? Uses, Dosage, and What You Need to Know in 2026

Darifenacin XR Is a Once-Daily Prescription Medication for Overactive Bladder

Darifenacin XR (generic name: Darifenacin Hydrobromide extended-release) is a prescription medication used to treat overactive bladder (OAB) — a condition that causes sudden, hard-to-control urges to urinate, frequent urination, and urge incontinence (leaking urine before you can reach the bathroom).

It belongs to a class of drugs called urinary antispasmodics, specifically the antimuscarinic (anticholinergic) subclass. It was originally sold under the brand name Enablex, manufactured by Novartis. Today, the brand has been discontinued and Darifenacin XR is available as a generic from multiple manufacturers including Par Pharmaceutical and Patriot Pharmaceuticals.

Darifenacin XR is not a controlled substance and does not carry a boxed warning.

What Is Darifenacin XR Used For?

FDA-Approved Use

Darifenacin XR is FDA-approved for the treatment of overactive bladder (OAB) with symptoms of:

• Urge urinary incontinence — involuntary urine leakage associated with a sudden, strong urge to urinate
• Urgency — a sudden, compelling need to urinate that's difficult to defer
• Urinary frequency — urinating more often than normal (typically more than 8 times in 24 hours)

OAB affects an estimated 33 million Americans, though the actual number may be higher since many people don't report symptoms to their doctor.

Off-Label Uses

Some providers may prescribe Darifenacin XR off-label for:

• Neurogenic bladder dysfunction
• Bladder spasms associated with catheter use

How Is Darifenacin XR Taken?

Darifenacin XR comes as an extended-release tablet in two strengths:

• 7.5 mg — the starting dose
• 15 mg — may be prescribed if 7.5 mg doesn't provide enough symptom relief after at least 2 weeks

Dosing Instructions

• Take one tablet once daily, at the same time each day
• Swallow the tablet whole with water — do not crush, chew, or break it (this would destroy the extended-release mechanism)
• Can be taken with or without food
• If you miss a dose, take it as soon as you remember — but if it's close to your next dose, skip the missed one and continue your regular schedule. Don't double up.

Dose Adjustments

• Moderate liver disease: Maximum dose is 7.5 mg daily
• Severe liver disease: Darifenacin XR is not recommended
• Taking potent CYP3A4 inhibitors (such as Ketoconazole, Itraconazole, Ritonavir, or Clarithromycin): Maximum dose is 7.5 mg daily

Who Should Not Take Darifenacin XR?

Darifenacin XR is contraindicated (should not be used) in people with:

• Uncontrolled narrow-angle glaucoma — anticholinergic medications can increase eye pressure
• Urinary retention — if you already have difficulty emptying your bladder
• Gastric retention or severely decreased GI motility — the drug slows the gut further
• Known allergy to Darifenacin or any ingredient in the tablet

Use Caution If You Have:

• Liver disease (dose adjustment required)
• Constipation or GI obstruction risk
• Controlled narrow-angle glaucoma (must be monitored by an ophthalmologist)
• Bladder outlet obstruction

Darifenacin XR has not been studied in patients under 18 years old. For older adults, use caution due to increased sensitivity to anticholinergic side effects.

Pregnancy and Breastfeeding

Darifenacin XR is Pregnancy Category C — there aren't adequate studies in pregnant women. It's also not known whether the drug passes into breast milk. If you're pregnant, planning a pregnancy, or breastfeeding, discuss the risks and benefits with your doctor.

How Does Darifenacin XR Work?

Darifenacin XR is a selective M3 muscarinic receptor antagonist. In plain English: it blocks specific receptors on your bladder muscle that trigger involuntary contractions. These contractions are what cause the sudden urgency and frequent bathroom trips characteristic of OAB. For a deeper explanation, see our guide on how Darifenacin XR works.

What makes it different from older OAB drugs is its selectivity. Medications like Oxybutynin block multiple types of muscarinic receptors throughout the body, which is why they tend to cause more side effects (especially cognitive effects like confusion). Darifenacin focuses primarily on the M3 subtype, which is the main receptor involved in bladder contraction.

How Much Does Darifenacin XR Cost?

Cost varies widely depending on whether you have insurance and whether you use a discount card:

• Retail price (without insurance): Approximately $250-$330 per month for 30 tablets
• With discount coupons (GoodRx, SingleCare): As low as $26-$50 per month for the generic
• With insurance: Generic Darifenacin ER is covered by most commercial plans and Medicare Part D, though you may need prior authorization or step therapy (trying cheaper OAB medications first)

The brand-name version (Enablex) has been discontinued, so generic is the only option — which is actually good news for your wallet.

For a complete breakdown of savings options, see our guide on how to save money on Darifenacin XR.

What About Drug Interactions?

Darifenacin XR has several important drug interactions, including with CYP3A4 inhibitors, certain antidepressants, and other anticholinergic medications. Always give your doctor a complete list of everything you take — including supplements and over-the-counter medications.

Final Thoughts

Darifenacin XR is a well-established treatment for overactive bladder that offers the convenience of once-daily dosing and a more targeted mechanism of action than older alternatives. It's available as an affordable generic, covered by most insurance plans, and can be prescribed by your primary care doctor or a specialist.

If you're living with OAB symptoms and haven't found relief — or haven't talked to your doctor about it yet — Darifenacin XR is worth asking about. And if you need help finding a prescriber or locating the medication in stock, Medfinder can help.