IRCT20210818052221N1 IRCT 2021-10-18 Zanjan University of Medical Sciences Effectiveness of Repetitive Transcranial Magnetic Stimulation in Obsessive-Compulsive Disorder Effectiveness of Repetitive Transcranial Magnetic Stimulation in the Treatment of Patients With Treatment Non-Response Obsessive-Compulsive Disorder 2021-10-23 anticipated 32 Complete https://irct.ir/trial/58243 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Used, Assignment: Parallel, Purpose: Treatment, Randomization description: Randomization of the study will be done with the help of a table of random numbers. Random number table is a set of numbers that is produced without a specific pattern or order and in a completely random way and has become a table. The pattern of reading the numbers from left to right will be determined and then the extracted even numbers will be assigned to the intervention group and the odd numbers will be assigned to the control group. This process will continue to reach the sample size, Blinding description: This study is double-blind and each patient receives a code and both rTMS and SHAM are performed by an rTMS specialist. The main collaborators of the project and the patients and all of them are unaware of which patient is in which group. 2-3 Obsessive-compulsive disorder. Intervention 1: Intervention group: A 1 Hz repetitive transcranial magnetic field will be performed on the lateral dorsal side of the left frontal cortex (L-DLPFC) for 20 sessions 3 times per week. In total, each intervention will last one month. Intervention 2: Control group: Control group: Ineffective repetitive transcranial magnetic stimulation on the lateral dorsal side of the left frontal cortex (L-DLPFC) in 20 sessions 3 times per week. In total, each intervention will last one month. Undecided - It is not yet known if there will be a plan to make this available Justification or reason for indecision in sharing IPD is There is no more information