My husband drank Rockin Rye, then covered himself with quilts to sweat it out. He would feel much better the next day.
Just sweating will do it. I think they are using the booze as an analgesic.
For congestion, I use a steam bowl with Vicks, thyme or sage. I then put on flannel pajamas and sox and sleep in a waterbed turned up to 90 degrees. Alternatively, use a heating pad with a thermostat. Pile on as many down quilts as you can. Down is more comfortable to me, because it is lighter. You will sweat and in the morning, make sure to drink as much real orange juice as possible.