How long does propecia "stay" in your system

after the last pill? Iv’e been off the drug for over two months and am still having problems. What’s odd is that the problems I am having now are different than the side effects I experienced while actually on the medication.

drug has 6-8 hr half life, DHT returns to baseline approximately 2 weeks/1 month after last dose due to slow off-rate of 5AR-II enzyme (~ 30 days).

I talked to a friend who is the chief on dermatology in a large hospital and asked her to ask around about fin. Their pathologist told something about six months. I don’t know if he was talking about how long it can be found in one’s system or about how long the sides can last.