Atazanavir and Ritlecitinib interaction
Atazanavir and Ritlecitinib: both prescribing labels describe 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 Atazanavir (REYATAZ) label · effective 2024-12-05
Immunosuppressants: cyclosporine, sirolimus, tacrolimus ↑ immunosuppressants Therapeutic concentration monitoring is recommended for these immunosuppressants when coadministered with REYATAZ.
From the Ritlecitinib (Litfulo) label · effective 2026-06-17
Clinically Significant Interactions Affecting Other Drugs CYP3A Substrates Where Small Concentration Changes May Lead to Serious Adverse Reactions Clinical Impact Ritlecitinib is a CYP3A inhibitor.
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.