Fesoterodine and Warfarin Interaction
Drug interaction information between Fesoterodine and Warfarin.
Fesoterodine and Warfarin have a documented minor interaction in FDA labeling.
FDA drug labeling documents a minor-severity interaction between Fesoterodine and Warfarin. This page displays the available source-record category and label text. The category is not an individual risk estimate or medication-combination direction.
How They Interact
Fesoterodine does not interfere with how warfarin works or how your body processes it.
FDA Label Information
7.7 Warfarin A clinical study has shown that fesoterodine 8 mg once daily has no significant effect on the pharmacokinetics or the anticoagulant activity (PT/INR) of warfarin 25 mg. Standard therapeutic monitoring for warfarin should be continued [see Clinical Pharmacology (12.3) ] .
Fesoterodine Also Interacts With
- Darunavir major
- Itraconazole major
- Ketoconazole moderate
- Clarithromycin moderate
- Estradiol minor
Warfarin Also Interacts With
- Fluoxetine major
- Tamoxifen major
- Ibuprofen moderate
- Aspirin moderate
- Diclofenac moderate
Frequently Asked Questions
What SPL severity band is on file for Fesoterodine + Warfarin?
Compiled FDA labeling labels this pair minor. That is a source-record field, not an individual medication-combination decision.
Which drug in this pair has the larger labeled-interaction portfolio?
Warfarin has 163 labeled pairs on file vs Fesoterodine's 15. In the minor band specifically: Fesoterodine has 11 (also Estradiol, Diltiazem, Fluconazole, Verapamil); Warfarin has 133 (also Atorvastatin, Amlodipine, Omeprazole, Famotidine).
What mechanism field is on file for Fesoterodine and Warfarin?
Fesoterodine does not interfere with how warfarin works or how your body processes it.
Warfarin's labeled portfolio outnumbers Fesoterodine
SPL source-record counts only. This page's band is minor · classes on file: Fesoterodine (Anticholinergic (Overactive Bladder)); Warfarin (Vitamin K Antagonist (Anticoagulant)).
2 major · 2 moderate · 11 minor · 15 total
- Other minor peers for Fesoterodine
- Estradiol
- Diltiazem
- Fluconazole
- Verapamil
2 major · 28 moderate · 133 minor · 163 total
- Other minor peers for Warfarin
- Atorvastatin
- Amlodipine
- Omeprazole
- Famotidine
Sources: FDA Drug Labels (SPL) via openFDA (2026). This is for informational purposes only and is not medical advice. This registry does not provide individual medication-combination directions.
Read our methodology - how this data is sourced, computed, and verified.