Haven't tried it, but some local guys have. he pain isn't all that bad I guess if you dilute it in the pin with some decca or eq. I've heard nothing bad.
I was on it and loving it. I stopped this week and started bridging for a little bit until I can start again. If you mix it with Eq there is no pain at all. I paid $60 for it in Nuevo Laredo. So go off that Terry.