Hi. My name is***** Dr. Rebecca isn't online at this time. If it is ok, I can assist at this time. How long ago was his last vomit? Has he been on the Kesium before? It is an antibiotic combination that can cause vomiting as a side effect in some.
Here in the US, our version of Kesium is Clavamox (it is amoxicillin and clavulonic acid too). When I'm using it on a 9 kg dog, I will dose it with the 125 mg tablet. So if the Kesium is 250 mg - 1/2 of it would be very similar in dosing to what I use. Could that still be very irritating to his stomach? For some, vomiting on it is a very problematic thing. Is he having any black stools or blood in the vomit?
That is good that there are no black stools or blood. If these were seen, then the concern for a stomach ulcer would be higher. The Inflacam is an NSAID and the most common side effect of it are stomach ulcers. Could it be causing some irritation too? You posted your second response as I was typing mine. You're doing good on researching the medications he's on! I would say that the Kesium seems to be more suspect for vomiting though.
As far as at home, the best thing you can do there in a situation like this with him is to stop both medications and to pull food and water for 6 hours to see if his stomach can settle down. After that, you can start to offer small amounts of water and then bland food like boiled chicken and white rice combination (1/3 chicken and 2/3 white rice) to see if he can keep that down. As far as the Kesium, that should be given with a meal ideally to help reduce its irritation potential. IF the vomiting continues, if he gets blood in the vomit or black stools, or if he's not improving - then could this all be due to something else?
I'm hoping for the best for this little guy. I really like the name Wilbur. Give him a belly rub for me and tell him to get better. Hopefully his anal glands will get cleared up and they can be a non-issue down the road.