I honestly don't know. I would call and ask before showing up
I wouldn't advise it because they take your vitals and coffee could spike temp and heart rate BUT after you get done with vitals you can drink it before you go to the back. I usually take a swig of something to stay awake.
Yes but be sure to drink lots of water. You wont be able to drink any caffeine for 2 hrs after so get your fix.
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