Amlodipine and Rifampin interaction
Amlodipine and Rifampin: both prescribing labels describe an interaction that usually calls for monitoring, a dose change, or spacing the doses.
Usually manageable with monitoring or a dose change. Tell your pharmacist you take both.
What the FDA labels say
From the Amlodipine (NORLIQVA) label · effective 2026-02-16
Blood pressure should be closely monitored when amlodipine is co-administered with CYP3A inducers.
CYP3A Inducers No information is available on the quantitative effects of CYP3A inducers on amlodipine.
From the Rifampin (Rifadin IV) label · effective 2026-05-27
…exposure Benzodiazepines Diazepam , Administered with rifampin 1200 mg daily Decrease exposure Benzodiazepine-related drugs Zopiclone Decrease AUC by 82% Zolpidem Decrease AUC by 73% Calcium Channel Blockers Diltiazem Decrease exposure Nifedipine Rifampin 1200 mg administered as a single oral dose 8 hours before administering a single oral dose of nifedipine 10…
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.