I'm taking paxil for 9 months. Then my doc shift me in vilazine 20. Paxil make my sex life horrible. Vilazine 20 is ok. But for last 2 months I'm taking vilazine 40 and my libido again decrease. It's not being harder anymore. I'm a healthy 35 years male non smoker .do working out everyday. So what should I do to return my sex power like past?