I have tried a couple of times to get through this quest. When Mekdawa aproaches me I give him the toad potion, he goes on thanking me and telling me that it is helpful. When I get back to the temple to receive a reward I get told that I still must give him the potion. I know I gave it to him because it is not in my inventory and he thanked me. I would not pay so much attention to this but I am interested in the next quest from the temple.

Storm: I had this problem once. You have to stay and listen to his entire spiel, or the temple won't give you credit for it. If he's running, just trot along behind him while he's talking. Buggy!

-Sazerac

Thanks Saz for the input I just tried it, it did not work. I guess it does not like me.