My daughter had one today(she has had it before). She is 15. My question is they gave her 100 grams of dextrose to drink. She chugged it. After I questioned the nurse , when she had it in the past they gave her 75gram. Of course her 2 hour # came back high at 194..But Looking the test up; it looks like you are supposed to give 75grams..I am going to call the lab tomorrow to double check; just annoyed. My daughter is FINE. But still; the nurse said she gave her the "adult " dose but I think she made a mistake.