I was going to say the same thing. Prozac in cats can take 2 weeks or longer to be effective. You need to give it longer. I know that you want a quick fix and are very frustrated by this, yet medication takes time.Also Prozac takes at least 3 weeks to start to have any effect on a human - so I assume it can take a while for a cat too. It's not a quick fix! Give it time to work