My husband and I discovered that completely bypassing the GI tract by using reglan injections worked much better in the end. Chica didn't get the extra pyramidal side effects
(extreme restlessness, shaking and trembling) from the reglan injections that she got from the oral meds. Our vet drew up a dozen or so prefilled syringes, and we administered them just under the skin at the back of the neck. If you're already doing sub-q fluids, this won't be any different.