honestly, you should have bought primatene tabs. they have ephedrine hcl, not ephedrine sulfate like bronkaid. ephedrine hcl is more potent. anyways, yea, you should take caffeine with it. start with 25mg ephedrine and 200mg caffeine. it will still cause thermogenesis, but caffeine just makes it much better and gives you more energy. they are VERY synergistic compounds.