effect of finasteride on psa levels
Finasteride reduces PSA levels to varying degrees in different men, making it difficult to track what the âtrueâ PSA values are over time. Finasteride fails to reduce PSA velocity (increases) in men with high-grade prostate cancer and fails to induce objective responses in men with metastases. Finasterideâs so-called âpreventiveâ effects in the Prostate Cancer Prevention Trial occurred far too early and did not increase much over time.