Depression is one of the most prevalent disorders seen in primary care
. About 50% of depression is treated in general medical settings. Alth
ough depression is highly treatable, incomplete response to a single a
ntidepressant is common. We describe two clinical cases in which antid
epressant augmentation was a therapeutic option and lithium carbonate
was an appropriate choice. A brief review of the practical aspects of
the clinical pharmacology of lithium is included. Lithium is a well-to
lerated, safe, and effective medication for antidepressant augmentatio
n.