I always take a yo yo bag or hexie bag with me. If I need lab work and have to fast which lately a couple times. I make sure my appointment is very early preferably right after they open up. I get nauseous feeling and headache if I haven't eaten by 8-830a.m. I will not wait past an hour for dr. appointment. I get antsy and ask why. Had a dr. when I first came down here. No matter my appointed time it was always 2 hours that lasted ended another hour. that was the first and last time I went to him. I would just go to urgent care. when I had a heart attack ended up in the ER and the heart specialist referred me to my current dr. Been with him for over 12 years. Now most of the time I'm home within the hour after my appointment. I still take my yo yo or hexie bag.