en psychiatry psychiatry case report case report <span style="font-size:14px;"><span style="font-family:Times New Roman;"><span style="color:#0000ff;"><strong><em>Background</em></strong><em>:</em> </span>Selective serotonin reuptake inhibitors (SSRIs) have proven more problematic in terms of some side effects than the original clinical trials suggested. Sertraline may displace warfarin from plasma proteins and may increase the prothrombin time. The aim of this study was to report a rare case of the sertraline- induced severe anal pain and rectal bleeding without concurrent of taking any other drugs including non-steroidal anti-inflammatory drugs (NSAIDs).<br> <span style="color:#0000ff;"><strong><em>Case Presentation:</em></strong></span> Here we report a case of a 31-year old married man who referred to a psychiatrist with depressive disorder and started to take sertraline up to 400 mg daily, thereafter the patient reported severe anal pain and bleeding. Other etiologies of this side effect were evaluated with Naranjo evaluation scale and rolled out. The patient did not report any anal pain or bleeding after eight months of stopping sertraline.<br> <span style="color:#0000ff;"><strong><em>Conclusion:</em></strong></span> Reported from sertraline, the psychiatrists must be more cautious when prescribing sertraline and monitor the patient properly for a long time to ensure these rare adverse effects and complic&shy;ations do not happen.</span></span> sertraline, bleeding, case reports 136 138 http://caspjim.com/browse.php?a_code=A-10-1473-2&slc_lang=en&sid=1 Pezhman Hadinezhad pezhman.hadinezhad@gmail.com 100319475328460033368 100319475328460033368 No Department of Psychiatry, Psychiatry Research and Behavioral Sciences Institute, Mazandaran University of Medical Sciences, Sari, Iran Hamzeh Hosseini hosseinish20@gmail.com 100319475328460033369 100319475328460033369 Yes Department of Psychiatry, Psychiatry Research and Behavioral Sciences Institute, Mazandaran University of Medical Sciences, Sari, Iran