"i took this after being on zoloft for anxiety &amp; social phobia. zoloft didn&#039;t work (i was on it for about 4 weeks and it gave me terrible headaches, couldn&#039;t sleep, but felt tired all the time). after about 2 weeks of being on lexapro, i got severe anxiousness and anger and rage. i had it for 3 days straight and my husband told me to call the doc and get off the meds. i also was dizzy all the time so much that i couldn&#039;t stand up without having to immediately sit down because of the world spinning. i&#039;m switching over to efexxor now and hoping that will help."