Zoloft is an antidepressant medication used to treat depression, anxiety disorders and Azithromycin for ear infection panic attacks. Zoloft works by increasing the amount of serotonin available in the brain. Sertraline is sold individually or read this blog article from Zitromax 2day along with a number of other antidepressants in a category called selective serotonin reuptake inhibitors (SSRI).