I agree a visit to the white coats is in order here. My Spencer throws up all the time, but this has been going on since he was a kitten - I've had him in to the vet numerous times and they can't find anything wrong. I've been giving him a Tagament pill when he has the really bad episodes and this seems to help. I've got giving Spence pills down to a Science, we all know that pilling a cat can be a real challenge.