Comprehensive and Detailed Step-by-Step Explanation:

Phenazopyridine (Pyridium) is a urinary analgesic that turns urine orange/red, so the correct auxiliary label should warn patients about this effect.

Explanation of Answer Choices:

A. May discolor urine Correct. Phenazopyridine causes urine discoloration.

B. May cause drowsiness Incorrect. Does not cause sedation.

C. Chew or crush the tablets Incorrect. Should not be crushed.

D. Take with food or milk Incorrect. Not required.

Reference:

FDA Drug Label for Phenazopyridine