Ledipasvir and sofosbuvir and Rifabutin interaction
Ledipasvir and sofosbuvir and Rifabutin: 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 Rifabutin label · effective 2026-09-01
ND 36% ↓ in C max and 24% ↓ AUC Co-administration of rifabutin with sofosbuvir (alone or in combination) is not recommended.
…antiretroviral drugs metabolized by CYP3A, including but not limited to products containing bictegravir, elvitegravir, oral rilpivirine, or doravirine and anti-HCV drugs including but not limited to sofosbuvir (alone or in combination) may decrease plasma concentrations of those drugs, which may lead to loss of virologic response and possible development of resistance.
From the Ledipasvir and sofosbuvir label · effective 2025-01-10
Antimycobacterials: rifabutin rifampin rifapentine ↓ ledipasvir ↓ sofosbuvir Coadministration of ledipasvir and sofosbuvir with rifampin, rifabutin, or rifapentine is not recommended [see Warnings and Precautions (5.3) ].
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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.