tolterodine vs trospium
PlainMeds reviewed this comparison against our methodology in August 2026. It places FDA and CMS record fields side by side, without recommending either medication.
Side-by-side comparison of tolterodine and trospium. Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
Detrol
Sanctura
Tolterodine extended-release capsules help control an overactive bladder. It reduces the feeling of needing to go to the bathroom often.
Trospium chloride (Sanctura) helps control an overactive bladder. It reduces the feeling of needing to go to the bathroom often.
This medicine treats overactive bladder. It helps reduce leaking urine, the strong need to urinate, and frequent urination. These symptoms are also known as urge urinary incontinence, urgency, and frequency.
This medicine treats overactive bladder (OAB). OAB can cause a frequent and urgent need to urinate. It can also cause urge urinary incontinence, which is leaking urine when you feel a sudden need to go.
Tolterodine belongs to a class of drugs called antimuscarinics. It works by blocking certain nerve signals to the bladder. This helps to relax the bladder muscles and reduce the urge to urinate.
Trospium chloride blocks the action of a chemical called acetylcholine. This chemical can cause bladder muscles to squeeze too much. By blocking acetylcholine, the medicine helps the bladder relax, reducing the urge to urinate.
- • Dry mouth
- • Headache
- • Constipation
- • Abdominal pain
- • Dry mouth
- • Constipation
- • Headache
- Fall 408
- Fatigue 406
- Dizziness 309
- Diarrhoea 308
- Nausea 308
No adverse event reports.
Anaphylaxis and angioedema (severe allergic reactions) have happened with this drug. These reactions can cause difficulty breathing and require emergency treatment. Use caution if you have bladder problems, gastrointestinal issues, or glaucoma. This medicine can cause sleepiness, so be careful driving or operating heavy machinery.
Trospium chloride should be used carefully if you have a bladder blockage or stomach problems, as it can cause you to not be able to urinate or have gastric retention. This medicine may cause swelling of the face, lips, tongue, or throat, which can be life-threatening. Get medical help right away if this happens. Trospium may cause sleepiness, so be careful driving or using machines until you know how it affects you.
It is not known if tolterodine is safe to use during pregnancy. Talk to your doctor if you are pregnant or plan to become pregnant. It is also not known if tolterodine passes into breast milk. Talk to your doctor about the best way to feed your baby if you are taking this medicine.
Tell your doctor if you are pregnant or plan to become pregnant. This medicine should only be used during pregnancy if clearly needed. It is not known if this medicine passes into breast milk, so talk to your doctor if you are breastfeeding.
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How to Read This tolterodine vs trospium Comparison
tolterodine is classified in the Anticholinergic (Overactive Bladder) drug class, while trospium 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, tolterodine has 1,739 submissions while trospium has 0. 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 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 tolterodine or trospium.
Registry boundary: This comparison displays source-record fields and does not provide individualized medical direction.