I would call the vet to be sure it's not a side effect of the meds. But even the physical act of putting drops in the eyes can cause gagging- the lacrimal glands in the eyes empty in to the nose and the drainage from the drops can irritate the back of the throat, setting off a gag reflex.
__________________ Don't get your knickers in a knot. Nothing is solved and it just makes you walk funny.  |