anxiety
"This medicine is a life saver.  I was diagnosed with anxiety/panic disorder in the spring of 2011, and I was on 30mg for a year.  The only side effect I had was lack of sex drive/ability.  Because of this, I weaned off it, and all of my anxiety and panic attacks came back.  I was miserable for about 2 months until I went back on it.  I've tried Zoloft, Remeron, and Wellbutrin, but Lexapro is the only one that worked for me.  I had zero panic attacks on Lexapro and enjoyed life.  I am currently back on 10mg and will be moving up to 20mg shortly.

Everyone's experience differs with these kinds of medicines, but my advice is: stay on it.  The first few weeks might be rough, but as long as the side effects aren't terrible, give it time."