Mania induced by adalimumab in a patient with ankylosing spondylitis

Objectives Monoclonal antibodies such as antagonists of tumor necrosis factor-alpha have been shown to have beneficial effects on the well-being of patients with inflammatory illnesses. However, mood episodes triggered by such agents have been reported. We herein report the case of mania induced by adalimumab treatment in an adult with ankylosing spondylitis, which later resolved once adalimumab was discontinued and mood stabilizers were initiated. Methods A 25-year-old man, with prior history of dysthymia, was diagnosed with ankylosing spondylitis and started on adalimumab. He gradually developed manic symptoms over seven to eight months, while maintained on adalimumab. As his condition did not improve with outpatient management, the patient was admitted to the Psychiatry inpatient unit. Results Valproate and aripiprazole were initiated, and adalimumab was substituted with non-steroidal anti-inflammatory agents. Mood symptoms resolved within days, and the patient was discharged. Upon follow-up, the patient was euthymic and compliant to his psychotropic medications. He was started on certolizumab, a different immunomodulatory, for his ankylosing spondylitis. Conclusions Immunological modulation might be a key factor in triggering, maintaining, or treating mood symptoms. Further research in this field is warranted to better understand the pathophysiology of mania. To our knowledge, manic symptoms induced by adalimumab have not been previously reported in the literature, which is why our case report can have an impact in recognizing this important clinical adverse effect.