I have definately noticed that when I drink I behave like I am in a manic state. Not sure how much of that is just being drunk??? I don't drink very often but I know how much I can have when I do drink. I noramlly attempt to get a good buzz at least. I know that when I am in a situation that I would normally be uncomfortable in, a couple of drinks and I am the bubbliest, most talkative person around. I am in a manic state for sure. I don't have to be drunk either. So I think that yes they can induce a manic state.