Which is a common side effect of phenazopyridine hydrochloride?

Phenazopyridine hydrochloride is a medication primarily used to relieve urinary pain, burning, urgency, and frequency that can occur with urinary tract infections. One of the hallmark characteristics of this medication is its tendency to cause urine discoloration. This can manifest as a bright orange or red color, which is not typically harmful but can be alarming for patients who are not informed about this effect.

This discoloration occurs because phenazopyridine is excreted in the urine, affecting its color. Understanding this side effect is crucial for patients to prevent unnecessary concern when they notice changes in urine coloration during treatment. In contrast, the other options may have some association with different medications or conditions but are not recognized as common side effects of phenazopyridine.