I'm currently on Lexapro and it seems to be working pretty well for me. In the past I've been on Zoloft but it do anything for me and I was also on Wellbutrin XL until I developed an unbearble reaction to it - it caused me entire body to tremble and all my muscle were spasming. I could actually see them moving - ewwwww. I won't ever take that med again.
As others have already said, everyone is different - your body chemistry is differnt than mine and anyone elses. So it could be trial and error for you until you find the one that works for you. Some of them you will start to notice differences in how you feel in a short time, but most of them take anywhere from 4-6 weeks to really kick into full force and do their job. Just be patient with it.
Good luck and keep us posted.
I have: Agoraphobia, Barrett's Esophagus, Bipolar Disorder, Depression, Fibromyalgia, Panic/Anxiety Disorders, Restless Leg Syndrome, Severe Acid Reflux, Sleep Apnea, and Social Anxiety
Meds: Ambien CR, Ativan, Flexeril, Lamictal, Lexapro, Neurontin, Nexium, Requip, Ritalin ER
A slip of the foot you may soon recover,
but a slip of the tongue you may never get over.