Zoloft (sertraline) is used for the treatment of depression, cost of paxil at walmart anxiety, and obsessive-compulsive disorder. Launched in 1992, it has been used in over 10 billion patient days of therapy. Zoloft is a SSRI drug that increases the level cost of paxil at walmart serotonin in the brain by inhibiting its breakdown. So why take Zoloft? Because it's an SSRI drug and easier on your liver...