- Have bladder outlet obstruction of intermediate severity as defined by a urinary peak flow rate (Qmax) of ≥4 to ≤15 milliliters per second (mL/sec) [from a prevoid total bladder volume (assessed by ultrasound) of ≥150 to ≤550 milliliters (mL) and a minimum voided volume of 125 mL] at beginning of placebo lead-in period.