fesoterodine vs itraconazole
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Side-by-side comparison of fesoterodine and itraconazole. Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
major Known Drug Interaction
Fesoterodine Patients with moderate to severe renal or hepatic impairment : Contraindicated during and 2 weeks after itraconazole treatment.
Toviaz
Sporanox
Fesoterodine is a medicine that helps control an overactive bladder. It reduces the feeling of needing to go to the bathroom so often.
Itraconazole capsules are an antifungal medicine. They treat fungal infections in your body.
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.
Itraconazole treats fungal infections like blastomycosis, histoplasmosis, and aspergillosis. It can help both people with healthy immune systems and those with weakened immune systems. It also treats onychomycosis, a fungal infection of the toenails or fingernails.
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.
Itraconazole stops fungi from growing. It does this by interfering with the production of a substance fungi need to build their cell membranes. This eventually kills the fungus and clears the infection.
- • Dry mouth
- • Constipation
- • Nausea
- • Rash
- • Headache
- Dry mouth 823
- Fall 529
- Tiredness 505
- Constipation 503
- Unable to empty bladder 502
- Drug Interaction 1,118
- Pyrexia 568
- Dyspnoea 474
- Pneumonia 461
- Nausea 445
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.
Itraconazole can cause congestive heart failure. You should not take this medicine if you have heart problems. Itraconazole can also interact with many other medicines. Some of these interactions can be dangerous or even fatal. Check with your doctor about all the medicines you take.
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.
You should not take itraconazole if you are pregnant or plan to become pregnant. It can harm your unborn baby. Talk to your doctor about safe alternatives.
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How to Read This fesoterodine vs itraconazole Comparison
fesoterodine is classified in the Anticholinergic (Overactive Bladder) drug class, while itraconazole sits within the Azole Antifungal class. Drugs from different classes work through distinct mechanisms, so a head-to-head comparison illustrates trade-offs rather than equivalence. 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, fesoterodine has 2,862 submissions while itraconazole has 3,066. Those figures reflect cumulative reporting volume, not per-patient risk, so older, widely dispensed drugs typically look worse on count alone. These two drugs have a known major interaction flagged in FDA labeling, attributed to itraconazole prevents the body from getting rid of fesoterodine, leading to higher amounts of the drug in your blood.. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.
A table cannot represent individual circumstances. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This registry does not provide medical, treatment, substitution, or medication-change directions for fesoterodine or itraconazole.
Registry boundary: This comparison displays source-record fields and does not provide individualized medical direction.