I hate those dreams. With me it's the drinking and drinks I've never had. They are so real, it freaks me out. And I'm also dreaming it's other people that give it to me. I'm not sure if it's my twisted mind telling me that it's okay to drink what I used to drink, because the stuff in my dreams is much worse. I don't know, I don't trust myself nor my subconscious mind.
As the day goes on though I realize it was just a dream and I'm still sober. I have to say that talking about it helps to take the reality out of it. Hope it did for you too.