Board Thread:Spoilers!/@comment-6175354-20140420035659/@comment-8345449-20140428134322

ChocolatEyes613 wrote: Nope.... Hook managed to escape the Enchanted Forest, as Snow White's curse was swallowing everyone else.

He didn't escape the curse. He was already outside the boundaries just like Ariel and Eric were since he took back the Jolly Roger and was off sailing the oceans (remember he said the bird landed on his ship). If it were possible to escape the curse, then the logical choice would have been to give the potion to Regina - the only one who has magic and who could perhaps create more memory potion from one sample.