Hi devender! Pexep CR (Generic Paroxetine CR) is used to treat depression, obsessive-compulsive disorders, panic attacks, social anxiety disorder, generalized anxiety disorder, and posttraumatic stress disorder. As Pexep CR (Generic Paroxetine CR) is a SSRI like Prozac, with continued treatment, it can help restore the balance of serotonin (a naturally occurring brain chemical) - which helps reduce the symptoms of anxiety and depression. Side effects Side effects from Pexep CR (Generic Paroxetine CR) are common, and include upset stomach, drowsiness, weakness or tiredness, excitement or anxiety, insomnia, nightmares, dry mouth, changes in appetite or weight.