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Greenville, NC
A 33-year-old female asked:

Taking phenazopyridine @ 2/wk for urinary urgency/discomfort. what are the long term effects of this drug? pamplet says caused neoplasia in lab rats?

1 doctor answer2 doctors weighed in
Dr. Stephen Chinn
Urology 38 years experience
Not more than 5 days: Pyridium (phenazopyridine) probably should not be used up for more than 5 days consecutively. You should consider a re-evaluation/re-assessment to r/o a UTI. Pyridium (phenazopyridine) is just a topical anesthetic and will not treat/eliminate any infection.

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Last updated Jun 18, 2015

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