Zoloft 50 mg contains active substance sertraline. Sertraline is one of a group of medicines called Selective Serotonin Re-uptake Inhibitors (SSRIs); these medicines are used to treat depression and anxiety disorders. Sertraline can be used to treat: • Depression and prevention of recurrence of depression (inadults). •Social anxiety disorder (in adults). •Post traumatic stress disorder(PTSD)(inadults). •Panic disorder(in adults). •Obsessive compulsive disorder (OCD)(in adults and children and adolescents aged 6-17years old). Depression is a clinical illness with symptoms like feeling sad unable to sleep properly or to enjoy life as you used to. OCD and Panic disorders are illnesses linked to anxiety with symptoms like being constantly troubled by persistent ideas (obsessions) that make you carryout repetitive rituals (compulsions). PTSD is a condition that can occur after a very emotionally traumatic experience and has some symptoms that are similar to depression and anxiety. Social anxiety disorder (social phobia) is an illness linked to anxiety. It is characterised by feelings of intense anxiety or distress in social situations (for example:talking to strangers speaking in front of groups of people eating or drinking in front of others or worrying that you might be have in an embarrassing manner).