I think this actually belongs in the Psycadelic forum but heres what i did anyways.
Okay well I don't really recommend this combination... once I took a rather small dose of extracted dxm I had made, and then I followed up with maybe 2 beers, 1mg xanax, and 2mg of ativan. As I recall, which isn't very much of course, I really just felt the benzos and alcohol.
I like my Dxm experiences to be on the strong side, and alcohol is not to be combined with large doses at all, as they are both depressants.
If you like Dxm, you'd be much better off just doing a 2nd-3rd plateau dose, and not drink!