Zosert 50 Tablet contains Sertraline, an antidepressant from the class of drugs known as selective serotonin reuptake inhibitors (SSRIs). It is primarily used to treat depression, anxiety disorders, panic disorder, obsessive-compulsive disorder (OCD), post-traumatic stress disorder (PTSD), and social anxiety disorder. Sertraline works by increasing serotonin levels in the brain, which helps improve mood and reduce symptoms of anxiety and depression.