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Eur J Case Rep Intern Med



Phenazopyridine-Induced Methaemoglobinaemia The Aftermath of Dysuria Treatment.


Hamza A, Nasrullah A, Singh R, DiSilvio B
Eur J Case Rep Intern Med. 2022; 9(2):003191.
PMID: 35265556.


Phenazopyridine is an over-the-counter urinary analgesic commonly used to alleviate the burning and urgency associated with lower urinary tract infections. Methaemoglobinaemia is an uncommon adverse effect of phenazopyridine use. We report a case of methaemoglobinaemia in a patient prescribed daily phenazopyridine to treat urethral and bladder irritation caused by a chronic indwelling Foley catheter.