Perioperative Tamsulosin for Treating Voiding Dysfunction Following Prostate Biopsy

This study is designed as a multicenter, randomized, controlled, open-label trial. Participants will be randomized 1:1 into two groups using a block randomization method. The experimental group will receive Tamsulosin Hydrochloride Sustained-Release Capsules (0.2 mg, once daily at night) starting 3 days before the biopsy and continuing until the 6th day after the procedure (10 doses total). The control group will not receive Tamsulosin during this perioperative period. All patients will undergo standard pre-biopsy preparations, including bowel preparation and prophylactic antibiotics. The primary endpoint, Acute Urinary Retention (AUR) incidence, along with secondary endpoints (IPSS, QoL, urinary flow rate, post-void residual urine), will be assessed on the 7th day after the biopsy. Safety indicators, such as the incidence of adverse events like orthostatic hypotension and falls, will also be monitored.

Inclusion criteria

• Male, aged 40 to 85 years (inclusive).
• Meets indications for prostate biopsy per clinical guidelines (e.g., suspicious nodule on digital rectal exam, suspicious lesion on imaging, tPSA >10 ng/mL, or tPSA 4-10 ng/mL with f/t <0.16 or PSAD >0.15).
• Voluntarily participates and provides written informed consent.

Exclusion criteria

• Previous prostate surgery, urinary diversion, or intermittent catheterization.
• Use of alpha-adrenergic blockers (e.g., Tamsulosin, Doxazosin) within one week prior to screening.
• Known or suspected allergy/intolerance to Tamsulosin, or history of orthostatic hypotension.
• Indwelling urinary catheter or suprapubic cystostomy tube at the time of biopsy.
• History of severe bleeding disorders.
• Poorly controlled or unstable comorbidities such as hypertension or diabetes.
• Severe immunosuppression.
• Severe psychological disorders or uncooperative for the biopsy procedure.
• Active urinary tract infection or neurogenic bladder.
• Any other condition deemed by the investigator as unsuitable for participation.