- Include, but are not limited to: concomitant lower urinary tract disease; previous prostatic surgery; history of postural hypotension or syncope; concomitant use of medications that may alter the voiding pattern; and clinically relevant biochemical abnormalities. Patients with a serum prostate-specific antigen (PSA) >10 ng/mL will be excluded, and those with an elevated serum PSA between 4 and 10 ng/mL must have prostate cancer excluded to the satisfaction of the investigator.