Effects of Histobulin on Depression and Anxiety in Chronic Urticaria: Psychiatric Manifestations or Psychiatric Comorbidities of Chronic Urticaria?: A Case Report

Abstract Background: Psychiatric comorbidities of chronic urticaria (CU) have been reported and examined recently. The prevalence of mental disorders and emotional distress is high in patients with chronic urticaria. Histobulin is well known to be effective in chronic urticaria. Case Presentation: Three cases of CU accompanying psychiatric manifestations (PMs) were treated with Histobulin. One patient with CU with severe depression showed clinical changes in depressive symptoms in parallel to changes in allergic symptoms. Histobulin improved not only chronic urticaria but also the accompanying PMs in two other patients with CU. The PMs were not improved by an antihistamine (H1 blocker) in all 3 cases. Histobulin is effective not only for allergic manifestations (AMs) but also for PMs of chronic urticaria. Conclusions: PMs seem to be clinical manifestations of chronic urticaria through histamine-mediated mechanisms. PMs as well as AMs of chronic urticaria were effectively and causatively treated with Histobulin. These conditions were suggested to be ‘allergic psychiatric manifestations (APM)’ or ‘histamine-mediated psychiatric manifestations (HmPM). Further study of PMs based on histamine-mediated mechanisms, including allergies, is necessary. Accordingly, it should be clarified whether the PMs of CU are actual PMs of CU or are psychiatric comorbidities of CU.