It really sounds like he is being overdosed.... I would only give him 1/2 a pill in the morning and 1/2 in the evening... If he is still so out of it, I would half that until he was NORMAL... I am sure kitties are like us humans, their bodies react differently to medications. Some having a higher tolerance than others for a medicine. I would do the 1/2 a pill for a week and then try uping it to a whole one, giving his body time to get use to it... All he may be able to handle is a half of one. It is not a one dose covers all. I learned that myself when I was on some drugs that knocked me out and made me goofy...