No it is not in the sense that you are thinking of. Like silent method said CF bypasses beta-2 receptors to directly stimulate certain messengers which release fatty acids and upregulate levels of ATP. It is a good alternative in my opinion to use in place of traditional stimulants for fat loss. Bypassing the beta-2 receptors should allow your body to regain it's sensitivity to ephedrine and the like.
I am confused about the depressant effect though, perhaps silent method could elaborate for us. I personally have never noticed any effect up or down from it. I do like to use it for fat loss though.