I would try Cerenia instead.I didnt know it posted twice.
I syrnged him famotidine then he threw up 5 mins later.
I have cerenia here.
I wonder what +2 ketones on the urinalysis means?
I hope it's +2 in mg/dL and not +2 in mmol/L.
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Good move giving the forti! I hope he'll get used to it because with the amount of antibiotics he is taking the fortiflora is good for him.Gave some wet food about a tblsp with water & fortiflora.

I saw your question here in Chuck's condo from yesterday, and rather than bump up the old thread thought I'd answer here. Here are some links below from the "Where Can I Find?" thread about digestive woes. I was the person who told StephG about the S. Boulardii. I have a civvie, McGee, a short-haired tuxedo cat about 4 years old. He was vomiting pretty much daily and I assumed it was hairballs. He was also extremely constipated. Always. Then Wendy and Marje shared the links below about chronic vomiting and probiotics.
I started McGee on probiotics. We bought the Renew Ultimate Colon Care (90,000 colony forming units) - I took 1 capsule and divided it up among my 3 cats each day. I gradually increased the amount, focusing on just McGee and Anya (another civvie who used to have chronic diarrhea) until McGee was getting one capsule alone, each day. I open up the capsules and mix with his food. He got that therapeutic dose (1 capsule per day) for 2 months, then I gradually decreased it. Now he gets 1 30,000 CFU (still Renew Ultimate brand) daily as a maintenance dose. I've noticed if I miss a day or two he'll vomit. If I get it to him daily, no vomit. He must have slow gut motility - causing both the vomiting and the constipation. It's been an amazing transformation.
He also gets a pinch of ground flaxseed (people quality) every day - the amount also was started very small, just a few grains, then increased until it seems to be the right amount to have pretty well eliminated the constipation. It's less than a measurable amount, but I worked up to it and recognize it as the right amount. The amount I can pinch - I'm sure it's less than 1/8 tsp.
I buy the probiotics at a local health-food type store, but I've seen Renew Ultimate at lots of stores and online. I also bought S. Boulardii - as I told Steph, my youngest daughter has been on multiple antibiotics simultaneously for 2 years because she has Lyme disease. She had one bout of C. Diff, but then we discovered S. Boulardii and since then (more than 1 year since the C. Diff) she hasn't had any recurrences of c. diff. Once you've had it you are more likely to have it again, but the S. Boulardii has prevented it. The stuff is a miracle in the Lyme world because it is so hard to be able to take continuous antibiotics. Anyway, there are "stop diarrhea" directions on the link about probiotics in IBD cats. Wish I'd known of it when Punkin got c. diff after taking Clindamycin for a post-dental infection. We buy Jarrow brand.
Digestive Problems:
Constipation, Maggie11 & Ann; Feline Constipation
Hairballs/Chronic Vomiting
Probiotics in IBD (or other) cats
Hairballs/Chronic Vomiting
Probiotics in IBD (or other) cats
Antacids (Pepcid)
Anyway, hope some of that helps answer your question and gives one example of how to use it in a cat. The Probiotics in IBD cats link has directions as well.
Or ask more questions!If ever one of the rest of us says something that seems to contradict what she's saying, go with her take.