Treatment-resistant depression is a heterogeneous condition that occurs wit
hin a psychosocial milieu. The impact of prior pharmacologic interventions
may have been adversely affected by a poor therapeutic alliance, low social
support, life stress, or chronic adversity and cognitive or personality fa
ctors such as neuroticism or pessimism. This article considers the psychoso
cial factors that predispose to treatment-resistant depression and the psyc
hotherapeutic principles thought to be helpful in both shorter- and longer-
term treatment plans. We focus on the interpersonal, cognitive, and behavio
ral forms of treatment that constitute the depression-focused psychotherapi
es, which have been studied in major depressive disorder. Also discussed ar
e modifications in treatment planning necessary to take into account the co
mplexity of treatment-resistant depression.