re:
As usual Paradise is way off base. Bartman never made a claim about relating coke use with hairloss you did. All he said was that you are full of sh*t and you are. It is up to you to provide evidence, which you cannot.
There has been no 100% proof that anything human beings consume can cause male pattern baldness. There are millions of theories and short lived studies but no absolute proof, the subject has simply not been studied enough because our scientists do not have the time (or $$) to do so. The only thing we know for sure is that genetics have a clear connection to male pattern baldness the rest is conjecture.
Coke and E are bad news, very bad news. Dealing with male pattern baldness is stressful enough, I would advise avoiding hard core drugs which with mess with your head even more. Seriously you will one day regreet your use of these substances. I do some work on the side with drug addicts and every single one of them started with "I was just having some fun and knew I would never become addicted." I have seen it too often, they always end up leaving you worse off in so many ways. That being said, there is almost no way that E and coke can effect finasteride effectiveness. Those drugs are out of the system in as little as 24 hours.