I've been taking fluoxetine 20mg for a week now and I feel as though I can't concentrate, I'm becoming a liability at work. My manager said I don't seem focused anymore, that it's as if I'm not even there at times. I haven't told them that I'm taking antidepressants because I know they'll be unsympathetic and get rid of me ASAP. I think I might need to stop taking these. Does anyone know how long these side effects last for? I don't want to lose my job.