Which adverse effect might the nurse expect anticholinergic medications to have on the patient's genitourinary system? The urine may turn red or black in color. Penile erection and priapism may occur. The urine may turn brownish-orange. Urinary retention may develop.

Anticholinergic medications are known to cause urinary retention as they can inhibit bladder contractions and decrease the urge to urinate. This might lead to discomfort and potential complications if not monitored carefully, especially in older adults, who may be more susceptible to these side effects. In addition to retention, patients might also experience difficulty starting urination or a feeling of incomplete bladder emptying. These effects can be quite bothersome, hence it’s essential for nurses to assess patients' urinary patterns and educate them on the importance of reporting any changes or discomfort they might experience.