"i started taking lexapro for major depressive disorder about 8 months ago. it started to work great and i got my energy back. i wasn&#039;t as depressed either, but that only lasted about 7 months. after a while my sex drive completely went away and it put a strain on my relationship. i also noticed i started to become more depressed as the time went on. i started to lose all the energy the medicine gave me. i tried to ween off of the medicine and it gave me terrible head aches and horrible nausea. i currently have been perscribed effexor, hoping that will help with the sex drive."