Antidepressant-associated mania or hypomania: A comparison with personality and bipolarity features of bipolar I disorder

Background: Hypomania/mania during antidepressant treatment is often neglected by clinicians. There are no specific diagnostic criteria for hypomania and mania associated by antidepressant treatment in the bipolar spectrum. The aim of this study is to compare various characteristics of bipolar I disorder and antidepressant-associated mania. Method: In this study, 76 bipolar patients who met DSM-IV criteria for bipolar disorder-type I in remission from mania or depression (Group 1; n = 44) and patients with major depression in remission, who had mania associated by antidepressant treatment (Group 2; n = 32), were admitted. All patients were assessed using the SCID I, Bipolarity Index (BI) and a patient data form. First-degree relatives of all patients were evaluated using the Mood Disorder Questionnaire (MDQ). Results: Sociodemographic features of both groups were similar. The rate of major depression in the relatives of Group 2 was significantly higher than in Group 1. The severity of manic symptoms in Group 2 was significantly lower than in Group 1. Those in Group 2 who were diagnosed with their first episode had atypical depressive features. First-degree relatives of patients in Group 1 had higher positive scores on the MDQ. A statistically significant difference was found between the two groups on all dimensions of the BI except family history. Limitations: This is a cross-sectional study with a relatively small number of subjects. There is no control group of major depressive patients who did not develop mania during antidepressive treatment. Conclusions: Our results suggest that antidepressant-associated hypomania/mania could be a different subgroup in the bipolar spectrum. (C) 2011 Elsevier B.V. All rights reserved.