The prostate cancer prevention test does not require fasting. It is recommended to avoid strenuous exercise, cycling or exercises that put pressure on the pelvic area, to refrain from ejaculating 24 hours before the test, to wait several weeks after a rectal examination or a prostate biopsy, to avoid taking the test if you have a prostate infection (prostatitis), discontinue certain herbal products as there is evidence that they raise PSA and report if you are taking drugs that may affect PSA, such as 5-alpha-reductase inhibitors (Finasteride or Dutasteride), as these drugs may lower PSA levels and mask the results.