Inclusion Criteria:  Newly diagnosed OCD patients diagnosed by Psychiatric Consultant of the Department of Psychiatry according to DSM-5 criteria (Appendix VI). Moderate to severe OCD patients having AY-BOCS score > 16 Age: 18 years or above Sex: Both male and female  Exclusion Criteria:  Patients receiving antidepressant within last two months.  Patients having any history of psychiatric and medical conditions will be excluded from the study. Patients having suicidal thoughts. Pregnancy and lactation. Patients who are receiving psychotherapy.