Zoloft is an antidepressant that is used to treat depression, anxiety and obsessive compulsive disorder. It is a selective serotonin reuptake inhibitor Furosemide 125 mg (SSRI) which help to increase the amount of serotonin available in the brain. Zoloft produces fewer side effects than older antidepressants called tricyclics, Furosemide 125 mg such as Elavil and Tofranil.