Journal
AMERICAN JOURNAL OF PSYCHIATRY
Volume 163, Issue 9, Pages 1519-1530Publisher
AMER PSYCHIATRIC PUBLISHING, INC
DOI: 10.1176/appi.ajp.163.9.1519
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- NIMH NIH HHS [N01 MH-90003] Funding Source: Medline
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Objective: More than 40% of patients with major depressive disorder do not achieve remission even after two optimally delivered trials of antidepressant medications. This study compared the effectiveness of lithium versus triiodothyronine (T-3) augmentation as a third-step treatment for patients with major depressive disorder. Method: A total of 142 adult outpatients with nonpsychotic major depressive disorder who had not achieved remission or who were intolerant to an initial prospective treatment with citalopram and a second switch or augmentation trial were randomly assigned to augmentation with lithium (up to 900 mg/day; N=69) or with T-3 (up to 50 mu g/day; N= 73) for up to 14 weeks. The primary outcome measure was whether participants achieved remission, which was defined as a score <= 7 on the 17-item Hamilton Depression Rating Scale. Results: After a mean of 9.6 weeks (SD=5.2) of treatment, remission rates were 15.9% with lithium augmentation and 24.7% with T-3 augmentation, although the difference between treatments was not statistically significant. Lithium was more frequently associated with side effects (p=0.045), and more participants in the lithium group left treatment because of side effects (23.2% versus 9.6%; p=0.027). Conclusions: Remission rates with lithium and T-3 augmentation for participants who experienced unsatisfactory results with two prior medication treatments were modest and did not differ significantly. The lower side effect burden and ease of use of T-3 augmentation suggest that it has slight advantages over lithium augmentation for depressed patients who have experienced several failed medication trials.
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