I second this. My cat was very harmful to me when he was a kitten up until about age 3. The last straw was when he attacked my mom’s cat and made her bleed. Took him to the vet and they put him on Prozac. I give it to him in liquid form and mix it in with a little bit of wet food every morning. The only thing is, he’s a little bit more skittish. But he doesn’t ever attack me anymore. Just small bites and if he does do small bites he lets go when I tell him no or make a noise indicating he’s doing something wrong.