Clomicalm is an anti-anxiety med that is usually used in dogs for separation anxiety but it's being used successfully w/cats for behavioral problems. I tried amitryptilene and at first it worked but it was short lived and Specs became very skittish and cried a lot. So my vet gave me some Clomicalm and I give him 1/4 tablet before bed. I've had no incidents since then and I have seen no side effects whatsoever. Ask your vet about it and maybe it'll be right for your cats. It sure has saved my furniture and my sanity.

Blessings,
Mary