Good luck w/the Clomicalm. I've not tried the generic, never even thought to ask if there was one. The stuff I use comes in small caplets and I quarter them to make 5 mg. per cat. I was lucky in that it started working right away but Dr. Lee said that it usually takes at least 4 weeks until it starts working. If that ever stops working, I'll go to kitty Prozac. I just ordered new furniture to be delivered on Sat. and I don't take chances. Let us know how it works for you.