Today was my first time taking Citalopram. I took it before work and had to leave because I was feeling dizzy, spacey, couldn't think straight and was shaking pretty badly. Not to mention the foam that I threw up for about 20 minutes when I got home. I'm on the 20mg dose. Is this something I have to get used to? My Dr mentioned that because of my age (I'm 20), that the symptoms and side effects may be worse.