"been taking 20mg per day of lexapro for 15 months now. was diagnosed with anxiety and slight depression. would have panic attacks and hyperventilate. took about 4 weeks to see full effect. was given klonopin as needed until lexapro kicked in. it has made me feel so much better. i have not had a panic attack in a year. i can actually get out of bed in the morning now. at first it would make me very tired when i took it but that stopped after a few months. it made a huge difference in my life. did not really have any side effects. a little weight gain but i would rather have that then have panic attacks."