Fosamprenavir and Raltegravir interaction
Fosamprenavir and Raltegravir: 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 Fosamprenavir (Fosamprenavir Calcium) label · effective 2026-06-30
HIV integrase inhibitor: Raltegravir a Fosamprenavir calcium: ↓ Amprenavir ↓ Raltegravir Fosamprenavir calcium/ritonavir: ↓ Amprenavir ↓ Raltegravir Appropriate doses of the combination with respect to safety and efficacy have not been established.
From the Raltegravir (ISENTRESS) label · effective 2026-07-13
Based on these data, ISENTRESS is not expected to affect the pharmacokinetics of drugs that are substrates of these enzymes or P-glycoprotein (e.g., protease inhibitors, NNRTIs, opioid analgesics, statins, azole antifungals, proton pump inhibitors and anti-erectile dysfunction agents).
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.