what is trilafon used for
Psychiatric Medications. Perphenazine Brand Name: Trilafon. Overview Trilafon is the brand name for perphenazine, a medium potency antipsychotic medication in a class of drugs called phenothiazines. Antipsychotics work by blocking the neurotransmitter dopamine in the brain, and decreasing the release of hormones from the hypothalamus and pituitary gland.