Efavirenz and Ledipasvir and sofosbuvir interaction
Efavirenz and Ledipasvir and sofosbuvir: 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 Efavirenz label · effective 2024-03-31
Velpatasvir/ Sofosbuvir ↓ velpatasvir Coadministration of efavirenz and sofosbuvir/velpatasvir is not recommended because it may result in loss of therapeutic effect of sofosbuvir/velpatasvir.
Velpatasvir /Sofosbuvir/ Voxilaprevir ↓ velpatasvir ↓ voxilaprevir Coadministration of efavirenz and sofosbuvir/velpatasvir/voxilaprevir is not recommended because it may result in loss of therapeutic effect of sofosbuvir/velpatasvir/voxilaprevir Other agents Anticoagulant:Warfarin ↑ or ↓ warfarin Monitor international normalised ratio (INR) and adjust warfarin…
From the Ledipasvir and sofosbuvir label · effective 2025-01-10
Consider alternative HCV or antiretroviral therapy to avoid increases in tenofovir exposures.
HIV Antiretrovirals: Regimens containing tenofovir DF without an HIV protease inhibitor/ritonavir or cobicistat ↑ tenofovir Monitor for tenofovir-associated adverse reactions in patients receiving ledipasvir and sofosbuvir concomitantly with a regimen containing tenofovir DF without an HIV protease inhibitor/ritonavir or cobicistat.
See Table 6 for use of ledipasvir and sofosbuvir with certain HIV antiretroviral regimens [see Drug Interactions (7.2) ] .
…when ledipasvir and sofosbuvir is used with the following drugs [see Clinical Pharmacology (12.3) ]: abacavir, atazanavir/ritonavir, cyclosporine, darunavir/ritonavir, dolutegravir, efavirenz, elvitegravir/cobicistat/emtricitabine/tenofovir alafenamide, emtricitabine, lamivudine, methadone, midazolam, oral contraceptives, pravastatin, raltegravir, rilpivirine,…
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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.