Asciritin is a name brand that is buffered with Maalox. Cheapest place I have found is drugstore.com. Zack has been on One a day for years and it helps with his elbow dyslpasia and other issues. Once or twice a year we have to go to Rimadyl for 4 days.
Oterwise at 10 he is doing well. He has elbow dyspepsia and has had both knee surgically fixed due to luxating knee caps. All and all he is pretty healthy for a 10 year old. Hopefully many years to come. Try the Ascritin, they have regular or extra strength, I use regular strength on a regular basis. Meaning daily, Once a day with food and Zack does well. When he is bad I resort to the presciption Rimqadyl, but you have to make sure he hasn't had any other drug for 24 hours.