Belladonna and opium and Efavirenz, lamivudine, and tenofovir interaction
Belladonna and opium and Efavirenz, lamivudine, and tenofovir: the Efavirenz, lamivudine, and tenofovir 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 Efavirenz, lamivudine, and tenofovir (SYMFI) label · effective 2019-10-15
Narcotic analgesic: Methadone ↓ methadone Monitor for signs of methadone withdrawal and increase methadone dose if required to alleviate withdrawal symptoms.
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.