Methocarbamol and Perphenazine interaction
Methocarbamol and Perphenazine: both prescribing labels flag 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 Perphenazine label · effective 2026-08-25
CONTRAINDICATIONS Perphenazine products are contraindicated in comatose or greatly obtunded patients and in patients receiving large doses of central nervous system depressants (barbiturates, alcohol, narcotics, analgesics, or antihistamines); in the presence of existing blood dyscrasias, bone marrow depression, or liver damage; and in patients who have shown…
From the Methocarbamol (ATMEKSI) label · effective 2026-03-13
CNS Depressants and Alcohol Use ATMEKSI may potentiate the effects of CNS (central nervous system) depressants and alcohol.
Patients receiving ATMEKSI (methocarbamol) Oral Suspension should be cautioned about combined effects with alcohol and other CNS depressants [ see Drug Interactions (7.1) ].
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.