Brexpiprazole and Phenobarbital interaction
Brexpiprazole and Phenobarbital: 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 Phenobarbital (SEZABY) label · effective 2025-12-23
CNS depressants: Closely monitor for sedation and respiratory depression.
CNS Depressants Closely monitor for signs of sedation and respiratory depression with concomitant use of SEZABY with other CNS depressants, including opioids [see Warnings and Precautions (5.1)] .
From the Brexpiprazole (Rexulti) label · effective 2026-04-23
Strong CYP3A4 inducers Double the recommended dosage and further adjust based on clinical response.
Strong CYP3A4 Inducers Clinical Impact: Concomitant use of REXULTI and a strong CYP3A4 inducer decreased the exposure of brexpiprazole compared to the use of REXULTI alone [see Clinical Pharmacology (12.3) ].
Intervention: With concomitant use of REXULTI with a strong CYP3A4 inducer, increase the REXULTI dosage [see Dosage and Administration (2.7) ].
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.