Primidone and Trifluoperazine interaction
Primidone and Trifluoperazine: the Trifluoperazine prescribing label flags this combination with the strongest language, such as a contraindication, a boxed warning, or an instruction to avoid it.
Do not combine without a prescriber's guidance. The label language below is the strongest FDA uses.
What the FDA labels say
From the Trifluoperazine (Trifluoperazine Hydrochloride) label · effective 2026-01-30
CONTRAINDICATIONS A known hypersensitivity to phenothiazines, comatose or greatly depressed states due to central nervous system depressants and, in cases of existing blood dyscrasias, bone marrow depression and preexisting liver damage.
Phenothiazines may lower the convulsive threshold; dosage adjustments of anticonvulsants may be necessary.
Potentiation of anticonvulsant effects does not occur.
Taking more than these two? Interactions stack. Check your whole list at once; it stays in your browser.
Open in the checkerNot medical advice. Interaction Checker quotes FDA label text and NIH fact sheets. Whether an interaction matters for you depends on doses, timing, kidney and liver function, and other conditions. Confirm with a pharmacist or prescriber.