Yeah I am wondering the same thing about nicotine...is it the other stuff in cigs that causes it to reduce the levels of benzos in your system or is it nicotine? Because I have an E-cig that is just nicotine. The only thing I have noticed is that when I am in minor benzo withdrawal that smoking the e cig makes me more anxious, like each puff. I usually take valium which has a long half life, and wondering if it makes me more anxious because its knocking off the valium still on my receptors, since it has such a long half life. But when I take a ton of benzos and smoke, it feels like the nicotine potentiates it, I can feel it come on stronger for a brief period