Zicam is a cough spray containing DXM.

2 will be 600mg...it will be a 3rd level trip. You'll probably have a bit of a hangover tomorrow...just kind of stuffy headed and a little disassociated. Nothing un-managable.

You should be fine to do it in your room...it's best to just turn all of the lights of and sit or lay in a comofrotable position while listening to music. Ambient trance or ambient downtempo/triphop is really nice....you might prefer ambient stuff over anything else because it's less of the focus of the trip, and more of just a spacey 'guide' for it. I typically can't watch movies or anything, because everything gets lkind of blurry and the light usually hurts my eyes.