Key takeaways
Flavoxate (Urispas) and Elmiron (Pentosan) are both used to treat urinary-related symptoms, but they have different uses and mechanisms. Flavoxate is an anticholinergic and antispasmodic that helps relieve urinary symptoms like painful urination and urgency caused by urinary or prostate infections. It works by relaxing the muscles around your urinary tract. On the other hand, Elmiron is a urinary analgesic used to treat bladder pain and discomfort caused by bladder pain syndrome (interstitial cystitis). Its exact mechanism isn't fully understood, but it is believed to protect the bladder lining from irritating substances in the urine. Flavoxate works quickly, within 55 minutes, but must be taken 3 to 4 times a day, while Elmiron can take 3 to 6 months to show effects and is taken 3 times a day on an empty stomach. Flavoxate is available as a lower-cost generic, whereas Elmiron is the only FDA-approved oral medication for bladder pain syndrome. Both medications have side effects, but Elmiron has specific risks like potential permanent eye damage and increased bleeding risk.
