I have bee. On Effexor 75mg xr for 1 year. My doctor added Cymbalta 30mg (originally 60mg but it seemed to increase irritability) because of the pain I was having due to sacroiliac joint dysfunction, and I have been on this combination for 6 months. The Cymbalta helped the pain, but it has ruined my sex life. So now we are weaning me off of the Effexor and starting Wellbutrin 150mg. How exactly does the Wellbutrin bring back my libido?