celexa is the sister drug to Lexapro which is what I was on. Both are SSRI's. Be very careful!!! I went through hell when it triggered me and I was then put on moodstabilizers for a very long time. If you start to go full blown manic/depressive your doctor will tell you to stop the drug immediately and he'll probably put you on lithium because it starts working in 5 days, meanwhile, you can start to titrate on lamictal slowly because it doesn't have many side effects if at all.