I have very similar experiences with Lexapro as medved has. I started taking it um.....I really don't know my memory is pretty shot these days lol. Maybe like 6-7 months ago? Hard to put an exact number on it. That's probably about right though, and I had terrible insomnia even before starting the lexapro though. I wouldn't be able to sleep at all and I'd stay up and watch pointless movies all night because I couldn't sleep. I went out and bought a bottle of 5 mg melatonin that you can buy over the counter. It's an over the counter sleep aid, and if it was really bad I would take the melatonin, give it an hout to try and fall asleep and if I still didn't fall asleep I would take a xanax. I did this religiously for about 1-2 months and every night was different. Some nights I would need the xanax, others I wouldn't. In the last 2 months though I don't need the xanax anymore, some nights I don't even need the melatonin. I still do take a melatonin though if I get aggravated from tossing and turning. I started doing some things different in bed though (dont worry, i know it sounds creepy worded this way lol). Instead of just lying there and watching sports, movies, tv shows, etc...after it hit 10 o' clock I would put the volume all the way down and roll over facing away from my tv. Sounds like a ridiculously easy idea, but when my anxiety was really bad I would just keep WATCHING tv and that focus would make it harder for me to fall asleep. By looking away from the tv and just closing my eyes I would just focus on trying to fall asleep. Or you can even leave the volume where it's at and still turn away from it and just focus on listening to it. I find both ways to be a lot more relaxing then just watching TV until you fall asleep. On certain nights where I'm really struggling I'll grab my ipod and put that on, I made a sleep mix made up of all mellow and slow songs. Thank god my friends don't know this or they might question my manhood ****. Anyway, that works as well.
I still do wake up like 2 times a night though. I can't really blame this on lexapro though as I've been doing this since I've started my battle with anxiety about 2-3 years ago. It used to drive me nuts, I used to look at it like it's such a big failure and that I'm not okay. Now I'm starting to work on my perspective of it. When I wake up now, instead of looking at the clock and getting angry and getting up to grab a drink or something, I just look at the clock, try and shrug it off and roll back to my side and try to go back to sleep. I find if I get up and do anything for example, grabbing something to eat, bathroom, a drink, etc it makes it so much harder for me to fall back asleep.
Best of luck to you though, I honestly believe the lexapro has helped me. Although I still have rough moments, I think overall it has worked pretty well for me. I used to depend on xanax everyday, in the last 2 months maybe I've taken xanax a total of 15 times? I used to take it twice a day so I used to need it 60 plus times in that sme period of time when I first started the med. Hang in there.