Yeah, there are lots of different kinds. Depending on the issue, length of problems, depth, etc. They wanted me to get on stuff that would take 2 months of taking to actually start having a positive affect. And, ironically, they also increase the change for suicidal thoughts during those couple months, and kind have some saddening sexual side affects as well. SSRI's can take a while to get off of as sudden discontinuation leads to withdrawal affects. But, in doing the research to answer your questions...I might be heading to a doctor soon, hehe.