Ok everyone's saying water so I'm going to say H20 or Hydralyte or Powerade/Gatorade so that you can replenish the electrolytes and nutrients you lose due to dehydration xoxo
A tall frosty glass of air - ask your doctor.
Drink plenty of water leading up to the last moment you are allowed to drink. If you are well hydrated, then it should be easier to withstand.
water, as much as you can so you're not dehydrated
I got really drunk.