The duration of treatment depends on a number of factors- for example is this the first episode of depression, how long has the episode lasted, is there a Significant ongoing stressor, are you following a regular yoga/ exercise / meditation routine which will help you maintain remission. I would recommend meeting with a psychiatrist and having a discussion on the above because the duration of treatment varies with each individual depending on these and other factors .

Treatment to depression is for 2yrs Side effects r varied depending on d type of antidepressants. However none are very debilitating. With proper medication u can definitely lead a normal life.