Have his kidneys been checked? Sounds like what Tubby was doing before I had him checked out. He is in the beginning stages of kidney failure. They can tell by doing blood tests. I think they check 2 or 3 different enzymes to see what their levels are. My vet suggested a 1/4 of a pepcid everyday. The pepcid helps the kidneys by allowing more blood to flow to them. And it helps his stomach by reducing the acid. I also have acid reflux disease, and it's no fun, and it does make me not want to eat sometimes. (Unfortunately the pepcid isn't strong enough for me. No, my pills cost over $100.00 a month, thank God for insurance!) The vet said just a 1/4 of a Pepcid a day will make a big difference in a cat. He will have less acid in his stomach, which should make him throw up less, which will in turn make his throat feel better, which will make him want to eat more, and when he does eat more, it will stay down so he'll get more of a benefit from it. Tubby was losing weight too. He was down to about 12 pounds, from a high of almost 16 at one point. He has now been on the pepcid for a year, and the vet says he's doing better than ever. One of his enzyme levels went back to where it was supposed to be, and they have leveled off (not gotten any worse) and he has gained back the weight so he is 15 pounds again.

Are you feeding him a "senior" cat food? Tubby gets Science Diet Senior, which the vet said was an excellent choice. Chronic kidney failure is a somewhat common thing for older cats. Tubby was first diagnosed at 15, but his throwing up had been going on for awhile before that. He has always had hairballs, so I just assumed that was the problem, until it got to the point where he was throwing up almost everyday. 12 is considered to be "senior" for a cat, so I would ask your vet to check his kidneys if they haven't already been checked, and as him about the pepcid. The thing the vet told me was that they haven't done enough studies on it to know for sure if it really helps them, but it doesn't hurt them at all, and the least it will do is reduce the acid in his stomach which right there will make him feel better. And from my experience with Tubby, I can only recommend it because his last report at the vet was "He's doing extremely well for a guy his age."

So check with your vet, and let us know what happens. I hope this helps, because I know what an awful feeling it is when they are vomiting. I feel like it hurts them so much, and I want to help but there's nothing you can do. Poor kitties.