Finasteride is Banned in Sports

I currently use propecia and need to know how long it takes to be out of your urine. If one was getting tested for anabolic steriods the finasteride cannot be in the urine because it is banned

I am not familiar with the testing of finasteride in the blood stream or the intricacies of exactly what chemical they are looking in the testing. I do know basic drug dynamics and the mechanism of finasteride. The half life of finasteride is 8 hours. This means if you took it at 7am, 50% will be in your body by 3pm. Then 25% will be in your body by 11pm, etc. I think you get the picture.

Now this is if you took one pill of finasteride only once, but I suspect you have been taking finasteride for a good while. This means that your body has a steady state of finasteride bound by proteins circulating in your blood (you can think of it as a reservoir). So it may be a bit more complex than just a half life value. I read an article on the web that says it takes 4 weeks for finasteride to bring DHT levels back to 20% baseline. I have no way of validating this claim, but you can use it to make an informed decision.