Generic competition · all medicines · read 12 November 2026

Is there a generic of Naltrexone, and who makes it?

Naltrexone appears in 1 dosage-form group in the FDA Orange Book as of 12 November 2026, with no generic maker listed as marketed. 1 group has a brand listed as marketed and no generic listed as marketed. The data does not state why, and it does not state that one is coming. Where both are dated, the first generic approval came 17.2 years after the first brand approval. This is the Orange Book's listing, not a forecast.

Compiled and checked by Vincent Wesley Couey (ORCID 0009-0005-6869-308X) from the Orange Book data files, downloaded 12 November 2026.

Not medical advice. This page reports what the FDA's Orange Book lists, not what a pharmacy has in stock, what anything costs, or whether a generic is right for you. Ask your pharmacist or prescriber about your own medicine.

Naltrexone1 dosage-form group in the Orange Book

0generic makers listed

Naltrexone appears in 1 dosage-form group in the FDA Orange Book as of 12 November 2026, with no generic maker listed as marketed.
1 group has a brand listed as marketed and no generic listed as marketed. The data does not state why, and it does not state that one is coming.
Where both are dated, the first generic approval came 17.2 years after the first brand approval.
Patents and exclusivities are shown as listed by the application holder; the Orange Book does not rule on them, and a listed patent is not a statement that a generic is blocked. This says nothing about price, supply or quality.

For Suspension, Extended Release, Intramuscular

Brand listed, no generic listed as marketed

Brand listed as marketed: Vivitrol. No generic is listed as marketed (1 generic product listed as discontinued).

generic makers listed as marketed, by first approvallisted patent expiryexclusivity end

Patents and exclusivities still listed

15 October 2029Patent 7919499

US Food and Drug Administration, Orange Book data files, downloaded 12 November 2026. A listed patent is not a ruling that a generic is blocked, and no figure here says anything about price, supply or quality. Check the Orange Book.

Where can you go from this result?

Open it in the check to search another medicine, or see every brand with no generic listed. The FDA explains generic approval in how generic drugs are approved and the FDA generic drug facts, and the Orange Book itself is the FDA Orange Book. To check what is available now, ask your pharmacist, and see the FDA drug shortages page.