A nurse is caring for a client receiving phenazopyridine (Azo) for urinary tract analgesia. Which of the following side effects is associated with phenazopyridine?

A. Phenazopyridine does not typically cause an increase in blood pressure; this effect is not associated with the medication. B. While gastrointestinal upset can occur, vomiting is not a primary or expected side effect of phenazopyridine. C. A well-known side effect of phenazopyridine is orange or reddish urine, which results from the drug's dye properties. D. Dizziness is not a common side effect; while it can occur, it is less specific to phenazopyridine compared to the characteristic orange urine.