darifenacin vs fesoterodine
Side-by-side comparison of darifenacin and fesoterodine Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
Enablex
Toviaz
Darifenacin (Enablex) is a medicine that helps control an overactive bladder. It reduces the feeling of needing to go to the bathroom so often.
Fesoterodine is a medicine that helps control an overactive bladder. It reduces the feeling of needing to go to the bathroom so often.
This medicine treats overactive bladder. If you have overactive bladder, you may feel a sudden need to urinate. You may also urinate more often than normal, or leak urine.
This medicine treats overactive bladder (OAB) in adults. OAB can cause you to feel a sudden need to urinate. It can also cause you to urinate more often than normal, and leak urine.
Darifenacin blocks certain receptors in the bladder. These receptors cause the bladder muscles to contract. By blocking them, the medicine helps the bladder relax and hold more urine.
Fesoterodine belongs to a class of drugs called anticholinergics. It works by blocking certain nerve signals to the bladder. This helps to relax the bladder muscles and reduce the urge to urinate.
- • Dry mouth
- • Constipation
- • Headache
- • Upset stomach
- • Nausea
- • Dry mouth
- • Constipation
- The medicine is not working 99
- Swelling in the hands, feet, or ankles 91
- Shingles 83
- Viral pneumonia 79
- Low red blood cell count 59
- Drug not working 1,662
- Dry mouth 823
- Fall 529
- Tiredness 505
- Using the drug for something it's not approved for 505
If you have bladder problems that cause you to have trouble urinating, use darifenacin with caution because it could make it harder to urinate. Use caution if you have stomach or bowel blockage, as this medicine can make it worse. Darifenacin may cause sleepiness, so do not drive or operate heavy machinery until you know how it affects you. Angioedema (swelling of the face, lips, tongue, and/or throat) has been reported with darifenacin and can be life-threatening.
Fesoterodine can cause swelling of the face, lips, tongue, or throat. This can be life-threatening, so stop taking the medicine and get medical help right away if this happens. Fesoterodine is not recommended if you have a blockage in your bladder or have problems with food moving through your digestive system. Use with caution if you have narrow-angle glaucoma or myasthenia gravis.
Tell your doctor if you are pregnant or plan to become pregnant. It is not known if darifenacin will harm your unborn baby. Talk to your doctor if you are breastfeeding or plan to breastfeed, as it is not known if darifenacin passes into breast milk.
It is not known if fesoterodine can harm an unborn baby. Talk to your doctor if you are pregnant or plan to become pregnant. It is also not known if fesoterodine passes into breast milk. Talk to your doctor about the best way to feed your baby if you are taking this medicine.
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How to Read This darifenacin vs fesoterodine Comparison
darifenacin is classified in the Anticholinergic (Overactive Bladder) drug class, while fesoterodine sits within the Anticholinergic (Overactive Bladder) class. Because both drugs share the same classification, they are often considered interchangeable in theory — but clinical outcomes rarely track that cleanly. Both drugs are prescription-only, so a licensed provider must authorize use.
Adverse event totals above are pulled from the FDA's Adverse Event Reporting System (FAERS). For these top-ranked reactions alone, darifenacin has 411 submissions while fesoterodine has 4,024. Those figures reflect cumulative reporting volume — not per-patient risk — so older, widely dispensed drugs typically look worse on count alone. No direct interaction between these two drugs is listed in our FDA-derived dataset, though co-prescription still warrants pharmacist review. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.
A table cannot substitute for clinical judgment. Effectiveness, tolerability, drug-drug interactions with your other medications, kidney and liver function, pregnancy status, insurance formulary, and price all feed into a decision that only a licensed prescriber can make responsibly. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This page is for educational purposes only, is not medical advice, and should not be used to self-switch between darifenacin and fesoterodine — always consult your physician or pharmacist first.
Important: This comparison is for informational purposes only. Drug effects vary between individuals. Always consult your doctor or pharmacist for personalized medical advice.