JOHN, a 53-year-old taxi driver, has noticed a change in his urination.He now makes frequent stops on his route to urinate, and has noted that his urinary stream is slow. He recalls that this has been occurring gradually for about five years.He remembers being told by a physician that his prostate was enlarged and requires treatment for his bothersome symptoms.John, likely, has benign prostatic hyperplasia (BPH).