Used primarily in the treatment of major depressive disorder, this compound functions as a tricyclic antidepressant by modulating neurotransmitter activity in the brain, particularly increasing the levels of serotonin and norepinephrine. It is prescribed when other antidepressants are ineffective, offering an alternative for patients with treatment-resistant depression. Its sedative properties also make it useful in managing anxiety and insomnia associated with depression. Due to its side effect profile, it is typically reserved for cases where newer antidepressants are not suitable.