Pretreatment with finasteride, but notdutasteride, appears to decreaseperioperative blood loss related totransurethral resection of the prostate(TURP) in men with benign prostatic hyperplasia (BPH), Chinese researchersconcluded in a paper published inBMC Urology (2015;15:47). 

In a meta-analysis of 17 randomizedcontrolled trials that included1,489 patients, Yi-Ping Zhu, MD, andcolleagues at Fudan University inShanghai also found that finasteridecan decrease blood loss per gram ofresected tissue, microvessel density(MVD), and vascular endothelialgrowth factor level. Pre-TURP dutasteridedid not decrease total bloodloss or MVD. Neither drug decreasedoperative time, prostate volume, orweight of gland resected.