As promised, I am following up with the results of my second PSA test. However, I think the issue requires a longer study involving more subjects.
When I first started on Propecia last year, I could feel the finasteride taking effect. It isn't easy to describe, but if you've felt it too, then you'll know what I mean. After some days, the feeling went away.
After about a month, I switched to Finpecia. I never felt anything, and I didn't see results. After several months, I began to suspect the Finpecia wasn't working.
I switched back to Propecia, and got the same feeling as when I first started. That made me very suspicious of Finpecia. If the two pills really were equivalent, then switching between them would make no difference.
However, I prefer objective test results rather than subjective feelings. So, I got my PSA level checked before switching back to Propecia, and again after seven weeks on Propecia. The results were identical.
How to explain the difference between my personal observations and the test results?
One, it might take longer than I thought for finasteride to reduce PSA levels. The article at
http://www.hairlosstalk.com/download/sawaya1.pdf states, "Finasteride causes a 30% to 50% decrease in prostate specific antigen (PSA) in clinical trials with 1 mg tablets in men 18 to 41 years old." My doctor also told me finasteride reduces PSA levels by half. In the study reported online at
http://www.hairlosstalk.com/download/propecia.pdf, median PSA levels dropped by 33% after 12 months. So, perhaps it takes 12 months to get a 33% reduction, and longer to get 50%.
Another possibility is, Finpecia might really reduce PSA levels as much as Propecia does. However, they felt different, which leads me to believe they are different, even though I can’t prove it with PSA levels.
A third possibility is, maybe Propecia did reduce my PSA level compared to Finpecia, but something else (e.g., prostate cancer) exactly offset the reduction. That would be an almost incredible coincidence though.
I wish that I had an unequivocal conclusion one way or the other. However, I am only one person, and the effect might vary from one person to another. If you are taking Finpecia and want to test if it really is equivalent to Propecia, I suggest doing the same experiment that I did, except wait longer for the second PSA test. My tests were covered by insurance, but if you have to pay, you can get tests for $60/pair online (free shipping). If you're over 40 and have a family history of prostate cancer, a PSA test may be recommended anyway.
One thing I did learn, the price of a Propecia ProPak at drugstore.com is actually cheaper than the price of Finpecia on the site that HairLossTalk.com links to. (Some sites offer Finpecia for less, but might not be reliable.) Also, Propecia.com has a list of doctors that provide free initial visits for hair loss, and prescriptions for Propecia where appropriate, and a $10 rebate on
http://www.perksprogram.com/propecia_us ... elcome.jsp. So, it doesn't cost much to try the brand names.