Finasteride is the best documented of the DHT inhibitors and most people notice no side effects from it. Some people do, however, experience a reduction in libido or notice more watery semen. Some get some increased facial oil, pimples or unusually high libido. Testicular ache is occasionally noted, probably due to increased testosterone output, and the body takes time to adjust to this. (Increased T levels: 15% on average in finasteride users, are likely in large part a compensatory response to reduced DHT.)

Most often any side effects dissipate within 2 or 3 months. If they do not, things should return to normal after discontinuing finasteride, although this may take a couple of weeks, as finasteride has a relatively long biological effect, although a short serum half-life.

Rather than avoid taking Propecia out of a fear of side effects, the most intelligent method is to try it out for a couple months. If you experience any sid effects at all, they will likely disappear after a few weeks and won't return. If they persist, simply discontinue treatment and try another regimen. For more information on Propecia, please read our Propecia Product Review.