Methadone and Rilpivirine interaction
Methadone and Rilpivirine: the Rilpivirine prescribing label describes 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 Rilpivirine (EDURANT) label · effective 2025-08-28
However, clinical monitoring is recommended as methadone maintenance therapy may need to be adjusted in some patients.
In healthy subjects, 75 mg once daily and 300 mg once daily (3 times and 12 times the dose in EDURANT) have been shown to prolong the QTc interval of the electrocardiogram.
QT Prolonging Drugs There is limited information available on the potential for a pharmacodynamic interaction between rilpivirine and drugs that prolong the QTc interval of the electrocardiogram.
In a study of healthy subjects, 75 mg once daily and 300 mg once daily (3 times and 12 times the dose in EDURANT) have been shown to prolong the QTc interval of the electrocardiogram [see Clinical Pharmacology (12.2) ] .
Narcotic Analgesics: methadone ↓ R(-) methadone ↓ S(+) methadone No dose adjustments are required when initiating coadministration of methadone with EDURANT or EDURANT PED.
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.