Though Pinkie Pie is immune to the effects of hyperglycemia, she has other occupational hazards to worry about...
For those who can't speak stretched-out-tongue, here's a translation of the last panel:
"Uh, Zecora? Do you got more tongue-shrinking potion for me?"
EDIT: For those who are wondering why Zecora doesn't rhyme, here's an answer straight from the zebra's mouth:
I've seen this crap so many times, I don't even bother making rhymes!