There were no other statistically significant differences between lithium and antidepressants according to all other outcomes considered .
AUTHORS ' CONCLUSIONS There was adequate efficacy evidence for lithium or antidepressants preventing relapse in unipolar affective disorder , however their relative efficacy was unknown .
BACKGROUND The main rationale for the use of lithium in the long-term treatment of unipolar affective disorder is its efficacy in treating bipolar affective disorder and resistant depression .
However , there is considerable uncertainty about which pharmacological intervention is most effective in the long-term treatment of recurrent unipolar affective disorder .
OBJECTIVES To assess the effects of lithium versus antidepressants for the long-term treatment of recurrent affective disorder .
Prophylactic effect of lithium and imipramine in unipolar and bipolar II patients: a preliminary report.
Relapse  rates of the first 35 unipolar and bipolar II manic-depressive patients who entered the controlled phase of a continuing evaluation of the prophylactic value of  lithium alone or in combination with imipramine were analyzed . Lithium had a prophylactic effect in unipolar patients and possibly in bipolar II patients . Imipramine did not have a prophylactic effect in either group of patients
There were no other statistically significant differences between lithium and antidepressants according to all other outcomes considered .
AUTHORS ' CONCLUSIONS There was adequate efficacy evidence for lithium or antidepressants preventing relapse in unipolar affective disorder , however their relative efficacy was unknown .
BACKGROUND The main rationale for the use of lithium in the long-term treatment of unipolar affective disorder is its efficacy in treating bipolar affective disorder and resistant depression .
However , there is considerable uncertainty about which pharmacological intervention is most effective in the long-term treatment of recurrent unipolar affective disorder .
OBJECTIVES To assess the effects of lithium versus antidepressants for the long-term treatment of recurrent affective disorder .