Best Answer: All side effects of Prozac are time limited in nature and you may get rid of this side within 1-2 weeks after starting the treatment. Sexual side effects:Prozac cause sexual dysfunction, and it is the most common adverse effect of SSRIs associated with long-term treatment. It has an estimated incidence of between 50 percent and 80 percent. The most common complaints are anorgasmia, inhibited orgasm, and decreased libido.