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Antisuicidal Effects in Mood Disorders: Are They Unique to Lithium?
Leonardo Tondo1,2,3, Ross J Baldessarini1,2
1Department of Psychiatry, Harvard Medical School, Boston, MA, USA.
Pharmacopsychiatry
|April 20, 2018
Summary
Long-term lithium treatment significantly reduces suicide risk and attempts in major depressive (MDD) and bipolar (BD) disorders. This mood stabilizer shows greater efficacy than some other treatments, particularly in depressive episodes.
Area of Science:
- Psychiatry
- Neuroscience
- Pharmacology
Background:
- Suicidal behavior is a serious concern in major depressive disorder (MDD) and bipolar disorder (BD).
- Lithium is a mood stabilizer with potential suicide risk-reducing effects in mood disorders.
Purpose of the Study:
- To review and meta-analyze evidence on the association between long-term lithium treatment and suicidal behavior risk.
- To compare lithium's effects with placebo and other pharmacological treatments.
Main Methods:
- Meta-analysis of 12 randomized trials involving MDD and BD patients.
- Review of ecological studies on drinking water lithium levels and suicide rates.
Main Results:
- Long-term lithium treatment substantially reduced suicide risk and attempts, especially in depressive phases of BD and in MDD.
- Lithium was associated with lower suicide fatality risk compared to placebo and possibly other mood-altering medications.
- Suicidal behavior risk was higher in agitated-dysphoric states than in manic or hypomanic periods.
Conclusions:
- Growing evidence supports lithium's suicide-sparing effects in mood disorders, potentially exceeding those of anticonvulsants or antidepressants.
- Further research is needed, particularly on antipsychotics, and challenges in designing suicide prevention trials persist.
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