There is no information that shows that warfarin increases a man's PSA numbers. There have been occasional reports of possible anti-cancer properties of warfarin, including reports of anti-prostate cancer effects, but no major studies have actually proven this. You can look at a study published in the June 29, 2000 issue of The New England Journal of Medicine, by Sam Schulman, M.D. where his study shows that people that took warfarin for 6-months had a strikingly lower cancer rate compared to patients who took only a six-week course.
The following activities will increase your PSA numbers: having a Digital Rectal Examination before drawing your blood; having an ejaculation 48 hours before drawing your blood; cycling including an exercise bike or motorcycling within a week before drawing your blood; and alcohol or coffee within 48 hours before drawing your blood. Hope this helps you.
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