RE: Cissus-Drol + Stimulant?
A stimulatory product is one which gives you a buzz, and "fake" energy. That's pretty much anything that contains caffeine. A pump product, typically, is one loaded with amino acids which are "supposed" to give you a pump in the gym.
In my opinion if you're not getting a pump from your diet naturally then it would be a waste of time buying it purely for the pump. The pump caused by these pump products, I believe, comes from having a positive nitrogen balance thus allowing your body to force more blood and oxygen into your muscle. With a good diet full of protein you would be able to achieve this naturally. Even when I'm not taking all the crap I do take I still get a good pump. In fact, it's got to the point now where even when I begin something like Epistane I don't notice much of a difference with regards to pumps.
Remember, pumps don't build muscle.