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A member asked:
Chemistry question: why does phenazophridne hydrochloride dye urine dark orange? what in this drug causes this side effect? please explain throughly.
3 doctors weighed in across 2 answers
Topical anesthetic: It is, in fact, an orange chemical dye (phenazopyridine) that is excreted in the urine, and acts as a topical anesthetic upon the urothelium.
Answered 5/19/2014
4.1k views
Not a side effect: Phenazopyridine is a urinary tract analgesic. Exactly how Phenazopyridine works is not known. It is thought to work by relieving pain on the lining of the urinary tract. Phenazopyridine may change the color of your urine to orange or red. It may also stain fabric. This is normal and not a cause for concern.
Answered 6/30/2014
4.1k views
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