Serta-100 Tablet belongs to a class of antidepressant drugs called selective serotonin reuptake inhibitors (SSRIs) used in the treatment of depression, post-traumatic stress disorder (PTSD), social anxiety disorder, panic disorder and obsessive-compulsive disorder (OCD). Depression is a mood disorder associated with symptoms such as sadness, unable to sleep properly or enjoy life as you used to do. OCD is a mental disorder with symptoms such as excessive thoughts or ideas (obsessions), leading to repetitive behaviours (compulsions). Panic disorder is linked to anxiety with sudden feelings of fear when there is no danger in reality. PTSD is a mental condition that occurs after experiencing a very emotional or terrifying event and has symptoms similar to anxiety and depression. Social anxiety disorder (social phobia) is associated with intense anxiety or distress in social situations.