Patient description: The patient is a 63-year-old man presenting to the Emergency Department with a history of acute urinary retention in the past 2 days. Abdominopelvic CT scan revealed a large prostate and a bladder filled with urine. He is a candidate for urethral catheterization and TURP. Further evaluation revealed: Post-void residual: 71 mL Prostate volume (TRUS): 63 mL Prostate-specific antigen (PSA) level: 3.5 ng/mL His recent blood chemistry (3 days ago) was normal: Hgb: 13.6 g/dl WBC: 133000 /mm3 Plt: 370000 /ml PT: 12 second PTT: 34 second INR: 0.9 Creatinine: 0.5 mg/dl BUN: 10 mg/dl U/A: Color: yellow Appearance: cloudy PH: 5.3 Specific gravity: 1.010 Glc: 100 Nitrite: negative Ketone: none Leukocyte esterase: negative RBC: negative WBC: 2 WBCs/hpf U/C: negative

Clinical trial eligibility criteria: eligible ages (years): 45.0-999.0,  Overactive Bladder Participant should have been on and agree to continue to stay on a stable dose of benign prostatic hyperplasia (BPH) treatment with either a) alpha blocker monotherapy or b) alpha blocker + 5 alpha reductase inhibitor Participant has an International Prostate Symptom Score total score of ≥ 8 Participant has a prostate-specific antigen level < 4 nanograms per milliliter (ng/mL), or if ≥ 4 ng/mL but ≤ 10 ng/mL, prostate cancer has been ruled out to the satisfaction of the investigator Participant must have both additional qualifications based on the 3-day Bladder Diary period: a) having an average of ≥ 8 but ≤ 20 micturition episodes per day over the 3-day diary period, and (b) having an average of ≥ 3 urgency episodes per day over the 3-day diary period Participant must have a post void residual volume value of < 100 mL Having at least 2 average nocturia episodes per night based on 3-day Bladder Diary at baseline. Nocturia is defined as waking to pass urine during the main sleep period  Participant has a history of 24-hour urine volume greater than 3,000 mL Has lower urinary tract pathology that could, in the opinion of the investigator, be responsible for urgency, frequency, or incontinence Has a history of prostate surgery, including minimally invasive transurethral or transrectal procedures, procedural treatments for BPH within 6 months of Screening or has a planned prostate surgery Has a history of urinary retention requiring an intervention (e.g., catheterization) for any reason Has maximum urinary flow (Qmax) < 5.0 mL/second with a minimum voided volume of 125 mL Has a history of or current nocturnal polyuria Has an active or recurrent (> 3 episodes per year) urinary tract infection by clinical symptoms or laboratory (≥ 5 white blood cells/high power field [hpf] with presence of red blood cell [RBC] and/or a positive urine culture, defined as ≥ 10^5 colony forming units (CFU)/mL (i.e., 100 × 10^3 CFU/mL in a single specimen) Has uncontrolled hyperglycemia (defined as fasting blood glucose > 150 milligrams per deciliter (mg/dL) or 8.33 millimoles per liter (mmol/L) or non-fasting blood glucose > 200 mg/dL or 11.1 mmol/L) or, if in the opinion of the investigator, is uncontrolled Has uncontrolled hypertension (systolic blood pressure of ≥ 180 millimeters of mercury (mmHg) and/or diastolic blood pressure of ≥ 100 mmHg) or has a resting heart rate (by pulse) > 100 beats per minute (min) Has a history of cerebral vascular accident, transient ischemic attack, unstable angina, myocardial infarction, coronary artery interventions (e.g., coronary artery bypass grafting or percutaneous coronary interventions [e.g., angioplasty, stent insertion]), or neurovascular interventions (e.g., carotid artery stenting) within 6 months prior to the Screening Visit