The short time that I used Prozac on both Storm and RB Starr, me vet called in the prescription to Costco, similar to Sam's Club, because she said it would be much cheaper here. I think that Storm's doseage was probably too high because all he wanted to do was to sleep. Later on he also refused to eat. I was later told that usually only dogs may become anorexic from prozac. I had to wean him off of prozac and he hasn't had any since.