is it possible for meds that have previously worked to stop working? I'm being a bit of a chicken in seeing my doc. I'm on effexor (venlafaxine). I don't know if i'm just getting worse, or if they've stopped working and maybe i should find new ones? but i really don't want the withdrawal symptoms. another question (and i'm feeling quite embarrassed asking this :unsure: ) have people, either on effexor or not, found that meds affect their sex drive? My sex drive is practically zero and it's beginning to affect my relationship. Lizzy.