The influence of finasteride on the blood testosterone level

How does Finasteride influence the blood testosterone level?

Contrary to what patients fear, the testosterone level lightly increases. However, the rate of DHT (dihydro testosterone) decreases by 50 % because Finasteride impedes the transformation of testosterone into DHT. This explains the observation of both blood modifications.

Efficacy of propecia (finasteride) and time before seeing its effect on hair loss