I can't offer up any proof or otherwise to these suggestions, however a guy that used to work for us would hit the O2 the morning after to help with the hangover, and he always said it worked great. The IV would be obviously beneficial due to the hydration offered up. BaldRob offered up some great advice and gatorade the next morning always worked pretty well for me.
The Oxygen works great! After a rough night or weekend, I would walk into the shop and grab the cutting torch, crank up the oxy bottle and take some good deep breaths.