Zoloft is an antidepressant medication used how to buy generic levaquin without dr prescription treat depression, anxiety disorders and panic attacks. Zoloft works by increasing the amount of serotonin available in the brain. Sertraline is sold individually or how to buy generic levaquin without dr prescription along with a number of other antidepressants in a category called selective serotonin reuptake inhibitors (SSRI).