An ex-flatmate of mine was type 1 diabetic, and she told me when I moved into the flat that if she ever became sleepy, aggressive, spaced out, etc etc, to get food into her straight away and to totally disregard anything she told me at the time about being fine and not wanting anything, however lucid or insistent she was. I'm sure when he recovers this lad will feel only too glad that you persisted.