When pediatric patients present with mood disorders, the process of assessing, diagnosing, and treating them can be quite complex. Children not only present with different signs and symptoms than adult patients with the same disorders, they also metabolize medications much differently. Yet, there may be times when the same psychopharmacologic treatments may be used in both pediatric and adult cases with major depressive disorders. As a result, psychiatric nurse practitioners must exercise caution when prescribing psychotropic medications to these patients.