my nearly 11 year old poodle was diagnosed with kennel cough today. He was given azithromycin oral suspension. First dose was at 2:30 p.m. Fine all afternoon, ate dinner about 5:00, started to show discomfort about 7:40 and vomited his dinner at 8:00. Then drank water and vomited that. He is now resting comfortably. I will call his vet in the morning, but do you feel the time between taking dose and vomiting (about 5 hours) gave the first does a chance to work? Should medicine be discontinued ($37) or just be sure to feed first and then give the dose?