The same thing happened to me
http://forums.steroid.com/showthread.php?t=125529
I got cought with alot more then roids though the dropped the controled substance charge for the roids which is a felony if i plead gulty to the possesion of mary jane, the whole fake id they could never amount enough evidence.
I had a clean record the will most likly give you a fine and put you n probabtion no sweat. what state you live in?