They aren't performance enhancing on the way down. Anyone can do the research for themselves on coming "down".
From what I have been told he may initially get a rise in performance on game day but it wouldn't last an entire game unless he is topping up at half time.
I'm sure its a lot more technical and scientific than that.
Agree though that if he manages to wriggle out of this by proving the drugs were taken out of the "24 hours before the game" period, then he still has to answer to the club for his behaviour. That might mean being sacked or it might mean a hefty punishment along the lines of JDG early this season. But thats for down the track. Needs to get past the authorities first....if he cant to that then his destiny is written.