^ Are you sure it was the pain meds and not the anesthesia? Being put under makes several people sick as a dog. My mom always throws up after surgery.
Several hospitals will give you anti nausea meds with pain killers as well. Even the mild ones.
I wish people would make up their minds about coffee or no coffee before fasting blood work. One doc says yes, one says no. One says one cup will not mess with your results, another says that it slightly *might* and another says it's measurable. Annoying. I'll take my chances with one watered down cup. It's that or kill people while driving un caffeinated and starving.