I took Paxil for several years for depression and anxiety. Two years ago I went through some pretty devastating changes in my life, and my doctor increased my dosage (from 10 mgs. to 20). I became totally numb. I felt nothing, and there are literally months 3-4 that I cannot account for. I didn' take care of myself, my home, my family. I just sat and stared at the walls (when I wasn't sleeping).
But obviously, it worked for me for many years. Just watch yourself. If you notice that you are sleeping a lot less or more, or if you become socially withdrawn, or if you don't (or can't) take care of yourself (hygiene, etc.), speak with your doctor.