Medications and Conditions Affecting PSA Levels

Medications That Do Not Increase PSA

Tamsulosin does not affect PSA levels and requires no PSA adjustment during monitoring, as recommended by the American Urological Association 1
5-alpha-reductase inhibitors, such as finasteride and dutasteride, decrease PSA levels by approximately 50% after 6-12 months, according to the National Comprehensive Cancer Network 1, 2

Saw palmetto and other herbal supplements may affect PSA levels through phytoestrogenic compounds, although the exact composition and specific effects remain poorly understood, as noted by the National Comprehensive Cancer Network 2, 3
Over 20% of men visiting prostate cancer screening clinics take herbal supplements that could potentially influence PSA, highlighting the need for careful evaluation, as recommended by the American Urological Association 2, 3

Prostatitis causes dramatic PSA increases and is more likely than cancer in men with very high PSA velocity, according to the National Comprehensive Cancer Network 2
Benign prostatic hyperplasia (BPH) and urethral/prostatic trauma can also elevate PSA, as noted by the American Urological Association 4

The National Comprehensive Cancer Network recommends using the same laboratory assay for serial PSA measurements, as different assays are not interchangeable due to different calibration standards 2, 4
Laboratory variability in PSA testing ranges from 20-25%, so the American Urological Association suggests confirming mildly elevated PSA in 3-6 months before proceeding to biopsy 4