My doctor, a psychiatrist, prescribed 20 mg. of Lexapro as a change from sertraline, which I have been taking for over 10 years. At first I felt a little more energetic. Now I am into the third week, and I feel like I'm drunk or something. My head hurts a lot. I'm wondering if I should cut it back to 10. I may just go back to the sertraline, but then I'm scared it will take too long to get working again. I see my doctor on a skype which is a little strange to begin with. Any comments are welcome.