Regurgatonic yields nothing

[NeverWinnerNite]

I was on the Bonethunder Staff Quest
I went to Ak'Anon, picked up the potion
and when I gave it to Mammoth he did not reguritate anything for me...

Normally this would make me happy, but in this particular case I really needed some puke.

Anyhow I'm camping here and I will try again later, unless I could receive some divine intervention from you fine folks.

Glanring
10 Cleric
Blue Server

Regards