Triavil is used to treat anxiety, agitation, and depression. Triavil is a combination of a tricyclic antidepressant (amitriptyline) and a tranquilizer (perphenazine).

Triavil can also help people with schizophrenia (distorted sense of reality) who are depressed and people with insomnia, fatigue, loss of interest, loss of appetite, or a slowing of physical and mental reactions.