Dapsone and Rifabutin interaction
Dapsone and Rifabutin: the Rifabutin prescribing label flags 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
Voriconazole 400 mg twice a day for 7 days (maintenance dose) 300 mg once a day for 7 days Healthy male subjects (12) ↑ AUC by 331%, ↑ C max by 195% ↑ AUC by ~100%, ↑ C max by ~100% compared to voriconazole 200 mg twice a day alone CONTRAINDICATED ANTI-PCP (Pneumocystis carinii pneumonia) Dapsone 50 mg once a day 300 mg once a day HIV-infected patients (16)
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.