Fosamprenavir and Nilotinib interaction
Fosamprenavir and Nilotinib: 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 Nilotinib (CAVHANZA) label · effective 2026-08-07
Avoid use of concomitant drugs known to prolong the QT interval and strong CYP3A4 inhibitors [see Drug Interactions ( 7.1 , 7.2 )] .
Avoid use of concomitant drugs known to prolong the QT interval and strong CYP3A4 inhibitors.
Therefore, avoid concomitant CAVHANZA use with strong CYP3A4 inhibitors and/or medicinal products with a known potential to prolong QT [see Dosage and Administration ( 2.9 ), Drug Interactions ( 7.1 , 7.2 )] .
Strong CYP3A Inhibitors: Avoid concomitant use with CAVHANZA or reduce CAVHANZA dose if concomitant use cannot be avoided.
Effect of Other Drugs on CAVHANZA Strong CYP3A Inhibitors Avoid concomitant use of strong CYP3A inhibitors with CAVHANZA.
From the Fosamprenavir (Fosamprenavir Calcium) label · effective 2026-06-30
Antineoplastics: Dasatinib, nilotinib, ibrutinib, vinblastine, everolimus ↑Antineoplastics Fosamprenavir calcium or fosamprenavir calcium /ritonavir may increase plasma concentrations of antineoplastics metabolized by CYP3A, potentially increasing the risk of adverse events typically associated with these medications.
Because ritonavir is a CYP2D6 inhibitor, clinically significant interactions with drugs metabolized by CYP2D6 are possible when coadministered with fosamprenavir calcium plus ritonavir.
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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.