Amitriptylene is an awful drug IMO, i took it briefly for my fibromyalgia, if it does what it did to me to a cat, i feel nothing but sorry for the cat, she sure will be doped to the eyeballs, like a zombie ,however i guess everyone is different and even though mine was in small doses it had a terrible effect on me, it could well do the same to a cat, but in Ally's case you may have no other choice, which is sad,but reality., i wish you luck with whatever you try.