It will take him a few days to come around again. my dragon, yardley, his sun was old, and he stopped eating his roaches, but will clear through his salad, daily. it never hurts to get an official diagnosis, however, i suspect that early stages of mbd might be happening here, though you haven't said anything about poor balance or twitching limbs.
hope this helps out, and let us know what the vet says, what is prescribed, if any, and how much and when to be given. also, be aware that coccidea is present in every dragon, but a count of 5 or better will mean medicines. you will want , if that is the case, to get some soy yogurt, flavored is fine, and offer .1 cc daily to help keep good tummy bacteria up and functioning. many medicines will damage not only the bad bacteria, but the good as well. also you will want to increase
bathing to daily, while on meds of any kind, as some will increase the chance of dehydration.
janie.