A female client starts a new prescription, oxybutynin, for symptoms of an overactive bladder. The client tells the nurse that she is training to run in a half-marathon. Which instruction should the nurse emphasize? Which instruction should the nurse emphasize?

C Wear padding to protect from bruising if a fall occurs. B Avoid crowds to help prevent acquiring infections. A Keep skin and eyes covered to protect from sun injury. D Take measures to avoid dehydration and overheating.