I was recently switched from 20 mg Celexa to 10 mg Lexapro. My doctor switched me because I was getting into a bad depression. I've noticed I'm having a hard time getting to sleep now. I was wondering if anyone else experienced this? *Note: I had been on 10 mg Celexa for over 3 years (originally prescribed for anxiety attacks). I'm sure my body was so use to the Celexa that I needed either the dosage increased or a change since I was really into a bad depression). This is why the Dr. changed me.