Fosamprenavir: uses, dosing, side effects & brands
Fosamprenavir is a medicine sold in the U.S. under one brand. Below: what the FDA label says, every product that contains it, what the pills look like, and its recall record.
Key facts
- Available as
- Tablet · Suspension
- Sold as
- Lexiva
- Prescription?
- Prescription only
- Generic available?
- Not in our catalog
Every fosamprenavir product we track (1)
Same active ingredient — different manufacturer, form, price and FDA recall record. That last one is what our independent score measures.
Only one: Lexiva.
What fosamprenavir pills look like
Imprint codes, colour and shape from the FDA’s labelling data. Match the imprint on your pill — or search any imprint.
Fosamprenavir and breastfeeding
From LactMed, the US National Library of Medicine’s Drugs and Lactation Database — quoted, not rewritten.
Full LactMed record for fosamprenavir: levels in milk, effects in breastfed infants, and the drugs it would consider insteadNo published information is available on the use of fosamprenavir during breastfeeding. Fosamprenavir is not recommended during breastfeeding. Achieving and maintaining viral suppression with antiretroviral therapy decreases breastfeeding transmission risk to less than 1%, but not zero. Individuals with HIV who are on antiretroviral therapy with a sustained undetectable viral load and who choose to breastfeed should be supported in this decision. If a viral load is not suppressed, banked pasteurized donor milk or formula is recommended.
National Institute of Child Health and Human Development, record revised July 15, 2024. LactMed states its information is not a substitute for professional judgement.
What people report to the FDA about fosamprenavir
The FDA Adverse Event Reporting System (FAERS) collects reports from patients and clinicians. It holds 152 reports naming fosamprenavir, and the FDA flagged 95% of those reports as serious. The effects reported most often — leaving out reports about overdose, misuse or the condition being treated, which dominate the raw list for common medicines:
- anaemia28 reports
- alanine aminotransferase increased27 reports
- aspartate aminotransferase increased27 reports
- haematuria26 reports
- pulmonary embolism26 reports
- vomiting26 reports
- acute kidney injury25 reports
- blood bilirubin increased25 reports
Read these as a signal, not a rate. A report does not mean fosamprenavir caused the effect — anyone can file one, and many describe people taking several medicines for several conditions. Crucially there is no denominator: FAERS does not record how many people took the drug, so these counts cannot be turned into “X% of patients” — a bigger number often just means a more widely used or more talked-about drug. Duplicates exist, and publicity drives reporting. For what is actually established, read the FDA label section above.
Source: openFDA drug/event (FAERS), retrieved July 25, 2026.
Related calculators
Frequently asked questions
Can you take fosamprenavir with other medicines?
It depends on the medicine. We check it against the FDA labels rather than guessing: our interaction checker searches each drug's own label for the other and quotes what it says, naming the section it came from. Run fosamprenavir against whatever else you take — and remember that a label not naming a drug is not the same as that combination being safe.
What forms does fosamprenavir come in?
Across the brands we track, fosamprenavir is currently marketed as tablet and suspension, per the FDA's National Drug Code Directory. Each form is dosed differently — follow the label for the exact product you were prescribed.
Is there a generic fosamprenavir?
We do not currently list a generic-labelled fosamprenavir product. That does not always mean none exists — it means none appears under a generic name in the FDA data we track. Ask your pharmacist.
Cite this page
- APA
- pharmaranks. (2026, July 24). Fosamprenavir: uses, dosing, side effects & brands. https://pharmaranks.com/drugs/fosamprenavir
- MLA
- “Fosamprenavir: uses, dosing, side effects & brands.” pharmaranks, 24 July 2026, https://pharmaranks.com/drugs/fosamprenavir.
We summarise public FDA and NIH sources — for a clinical claim, cite the primary source we link to as well.
Sources: FDA openFDA drug label, National Drug Code Directory, and Enforcement (recall) database. This page reproduces public FDA data and is not medical advice. Dosing is set by your prescriber.
Read the full FDA label for fosamprenavir on DailyMed (NIH) ↗.