I am also on Lexapro. I haven't noticed a change for the worse in my sex drive, but it was so low already that it'd be hard to tell! One thing I will say is this: if you suffer from depression and/or anxiety, it's no wonder that you have a low sex drive. I say this in hindsight after wondering for so long what was "wrong" with me that I wasn't interested in sex. I now understand that my depression caused me to have to let everything but the bare essentials go. If I barely have the energy to care for myself and my daughter, then of course I'm not going to have anything left over for intimacy with my DH.
I've been on Lexapro for 3 months now, and I feel SOOOO much better. But there is still a long way to go. I now have the will and energy to do more, but I'm still repairing my overall health. I was/am so depleted that I just seem to catch everything that goes around. My work with a therapist has always felt worthwhile, but has really taken off in positive directions since going on Lexapro. So mentally I feel pretty good, emotionally I'm doing much better, I just need to build my physical health back up!
Good luck to you. Even if Lexapro had a negative effect on my sex drive, I would still very much think it's worth it. I actually feel like myself again, and can enjoy my daughter, and that's something I really missed.
Warmly,
Carol