June 2007 in “Nature Clinical Practice Urology” This study found that taking 1 mg of finasteride daily for male-pattern hair loss significantly reduces serum PSA levels, suggesting similar PSA adjustment is needed as for higher doses during prostate cancer screening.
April 2012 in “The Journal of Urology” This study modeled how differences in trial settings and protocols, such as biopsy compliance and control arm screening, can explain the varying prostate cancer mortality reductions observed in the ERSPC and PLCO trials.
March 2009 in “The Journal of Urology” Low dose finasteride causes only minor changes in PSA levels in men over 50 with BPH.
October 2025 in “International Journal of Social health” This systematic review reported that among men taking finasteride for benign prostatic hyperplasia, total PSA levels decreased by 30% to 50%, and free PSA by up to 45%, with reductions in prostate volume and PSA density observed as well.
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January 2009 in “Journal of Cutaneous and Aesthetic Surgery” This study found no clear evidence that finasteride negatively affects erectile function, though it does cause a reduction in ejaculatory volume and has potential implications for prostate cancer risk.