New understanding of how antidepressants work

Antidepressants work in major depressive disorder through serotonin boosting that restores functional brain connectivity rather than through a simple serotonin deficit. Researchers from the University of Colorado Anschutz Medical Campus propose a neuroplasticity framework: classic antidepressants such as SSRIs strengthen communication between brain regions involved in reward, mood, self esteem, and problem solving. Because major depressive disorder is not caused by a single uniform chemical imbalance, the framework reframes clinical communication about why SSRIs and related treatments remain effective. The same neuroplasticity logic is also linked to other interventions that increase neuroplasticity, including esketamine and psychedelics, with the goal of helping clinicians discuss treatment effectiveness more clearly with apprehensive patients.