The hunger from the fasting was kind of hard on me, tbh. This pregnancy has given me a ravenous appetite and I typically feel the need to eat every hour or so. Once I was finally released, we went to a buffet for lunch, and I was so hungry that I ate until I felt sick - which is not good, or healthy.
But the glucose drink didn't bother me as far as queasiness or dizziness goes (it didn't for the 1 hour either).
Definitely bring something to keep yourself entertained otherwise you will be bored witless. I got sent back out to the waiting area after each blood draw. I took some cross stitching, but mostly ended up playing monopoly with my husband on our tablet which I also used to read my book when at one point he went to find a gas station for a snack.
My lab didn't have a problem with me drinking plain water. I had a big 32 oz plastic to-go cup full of water that I used to try and keep hunger pangs at bay.