Haloperidol and Methocarbamol interaction
Haloperidol and Methocarbamol: 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 Haloperidol (Haldol Decanoate) label · effective 2025-11-11
Prevention or Management Avoid concomitant use of HALDOL DECANOATE with CNS depressants such as anesthetics, opioids, and alcohol.
CNS Depressants Clinical Impact Haloperidol may potentiate CNS depressants.
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.