Reduced suicide risk during lithium maintenance treatment

Area of Science:

• Psychiatry
• Pharmacology
• Clinical Psychology

Background:

• Bipolar disorder is associated with a high suicide rate, with approximately 20% of patient deaths linked to suicide.
• Suicidal events in bipolar disorder often occur during depressive or mixed episodes.
• Long-term lithium treatment is a recognized intervention for bipolar disorder, with potential implications for suicide risk reduction.

Purpose of the Study:

• To quantify the relationship between lithium maintenance and suicidal behavior in bipolar disorder patients.
• To compare suicide and suicide attempt rates in patients on lithium versus those not on lithium.
• To evaluate the protective effect of lithium against suicide in bipolar disorder.

Main Methods:

• A comprehensive review of 22 studies conducted between 1974 and 1998.
• Analysis of previously reported data alongside reviewed studies.
• Quantification of suicidal rates based on the presence or absence of lithium maintenance.

Main Results:

• Patients receiving long-term lithium treatment exhibited a 7-fold lower rate of suicide compared to periods without lithium or when lithium was discontinued.
• Suicidal rates during lithium treatment approached general population base rates.
• The protective effect of lithium against suicide was observed across various comparison groups.

Conclusions:

• Lithium treatment offers significant, though incomplete, protection against suicide and suicide attempts in bipolar disorder.
• Improved management of bipolar depression is crucial for further reducing suicidal risk.
• Further research into alternative treatments for bipolar disorder and their impact on suicidal behavior is warranted.