I am sorry to sound ignorant, but, although I have heard of 70/30, I am unfamiliar with how it works. I am guessing that 70/30
insulin is in lieu of NPH, but the question
is...does he need
regular to cover food or does he only get the regular insulin at night as you mentioned?
What does his Endocrinologist say? The only thing that comes to mind for me is that he has done a lot of growing from 14 -19 yrs. of age, going through puberty, etc.