our 2 yr. old American Eskimo male was treated for a parasite that made him vomit after every feeding. It worked but he is now just vomiting after he drinks water. He burps and up it comes. No wretching or gagging, just a burp and the water runs out of his mouth. He is very active, does not appear ill. Lot of energy. Can you help? Please!

Optional Information:
Age: 2; Male; Breed: American Eskimo

Already Tried:
The vet gave him 1/2 of a pill called Drontal Plus. I think that is what it is, I had trouble reading the vets writing. It helped some, but not completely, they gave him the other half a week or two later. It helped stop the vomiting of food but now he vomits after he drinks water. He burps and the water just runs out of him mouth.