Jay M. Pomerantz, MD

For many years, research on mood disorders has focused on neurotransmitters, particularly on the monoamines (serotonin, norepinephrine, and dopamine) and their action at the neuronal junction, or synapse. Although the monoamine theory helps explain the action of tricyclics, monoamine oxidase inhibitors, and SSRIs, it fails to account for many other things.

Epidemiological studies report a lifetime prevalence rate of 24.9% for (any) anxiety disorder. Feelings of anxiety can also be related to normal fear of pain, loneliness, ridicule, illness, injury, grief, or death. In both these types of situations, anxiety can be difficult to deal with. Consequently, benzodiazepines, which offer almost immediate symptomatic relief for anxiety, can be quite appealing to many persons.

Although treatment-resistant depression is defined in terms of a person's depression being resistant to medication, it usually also means that the patient has been unresponsive to whatever psychotherapy has been tried along the way. What might not be clear from the above but is known by all clinicians is that patients with TRD experience much internal suffering and misery.

Antidepressants may have a protective effect on the hippocampal atrophy seen in patients with severe, untreated depression. This atrophy may be caused by an overabundance of glucocorticoids.

Pilot studies show that preventing PTSD after vulnerable persons are exposed to extreme life-threatening trauma is possible, although we are in the very early stages of knowing exactly what to do.