Metoclopromide to help control any nausea. Ask them for the appropriate dose of Zantac (rantidine) which you can buy OTC at any Walmart. The Vets may IV in some phosphorous binders tomorrow, and place the dog on an anti-hypertensive drug to help the kidneys function. You may have to keep him on the Hills k/d diet, with no added sources of phosphorous (e.g. bones) for the remainder of his life. Low protein diet but of high quality - hydrolized.