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darifenacin vs thioridazine

Side-by-side comparison of darifenacin and thioridazine. Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.

moderate Known Drug Interaction

7 DRUG INTERACTIONS Caution should be taken when darifenacin extended-release tablets are used concomitantly with medications that are predominantly metabolized by CYP2D6 and which have a narrow therapeutic window, such as flecainide, thioridazine and tricyclic antidepressants ( 7.2 ) The concomitant use of darifenacin extended-release tablets with other anticholinergic agents may increase the frequency and/or severity of dry mouth, constipation, blurred vision and other anticholinergic pharmacological effects. 7.3 CYP2D6 Substrates Caution should be taken when darifenacin extended-release...

Recommendation: Use this combination with caution. Your doctor may need to adjust your dosage or monitor you more frequently for side effects.

Drug Class
darifenacin Anticholinergic (Overactive Bladder)
thioridazine Typical Antipsychotic (Phenothiazine)
Type
darifenacin Prescription
thioridazine Prescription
Summary
darifenacin

Darifenacin (Enablex) is a medicine that helps control an overactive bladder. It reduces the feeling of needing to go to the bathroom so often.

thioridazine

Thioridazine is a medicine used to treat schizophrenia. It is only used when other antipsychotic medicines have not worked well enough.

What It Treats
darifenacin

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.

thioridazine

Thioridazine is used to manage schizophrenia in adults and children. You should only use this medicine if other antipsychotic medicines have not worked for you. This is because thioridazine can cause serious heart problems.

How It Works
darifenacin

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.

thioridazine

Thioridazine affects the balance of certain chemicals in the brain. These chemicals, like dopamine, can affect mood and behavior. By changing the balance, thioridazine helps to reduce symptoms of schizophrenia.

Common Side Effects
darifenacin
  • Dry mouth
  • Constipation
  • Headache
  • Upset stomach
  • Nausea
thioridazine
  • Drowsiness
  • Dry mouth
  • Blurred vision
  • Constipation
  • Nausea
FAERS Reports
darifenacin
  • Swelling in the hands, feet, or ankles 91
  • Shingles 83
  • Viral pneumonia 79
  • Low red blood cell count 59
  • Joint pain 59
thioridazine
  • Weight gain 8
  • Shortness of breath 7
  • Muscle spasms and contractions 6
  • High blood sugar 6
  • Low oxygen levels 6
Serious Warnings
darifenacin

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.

thioridazine

Thioridazine can cause a life-threatening heart rhythm problem called Torsades de pointes, which can lead to sudden death. Because of this risk, only use thioridazine if other antipsychotic medicines have not worked. Elderly patients with dementia-related psychosis who are treated with antipsychotic drugs have an increased risk of death.

Pregnancy
darifenacin

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.

thioridazine

Tell your doctor if you are pregnant or plan to become pregnant. It is not known if thioridazine will harm your unborn baby. Talk to your doctor about the risks and benefits of taking thioridazine during pregnancy and breastfeeding.

Also Compare, Nearby Drugs

How to Read This darifenacin vs thioridazine Comparison

darifenacin is classified in the Anticholinergic (Overactive Bladder) drug class, while thioridazine sits within the Typical Antipsychotic (Phenothiazine) 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, darifenacin has 371 submissions while thioridazine has 33. 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 moderate interaction flagged in FDA labeling, attributed to darifenacin can slow down the way your body breaks down thioridazine. this can cause thioridazine to build up to unsafe levels in your blood, which may lead to dangerous side effects.. 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 thioridazine - 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.