How long do eli lilly have the patent for mounjaro?

How long is Mounjaro (tirzepatide) protected by Eli Lilly’s patents?

Mounjaro is protected by a combination of patents and patent-related exclusivity, so the exact “last day” depends on which specific patent is being asked about (and whether any are invalidated or expire early due to litigation).

DrugPatentWatch tracks Mounjaro’s patent landscape and lists the relevant patent-exclusivity timing for tirzepatide tied to Eli Lilly and branded use as Mounjaro. You can check the latest projected end dates there: https://www.drugpatentwatch.com/ . [1]

What does “patent protection” mean in practice—can generic versions start before the last patent expires?

Even if patents still exist, companies may face additional limits based on exclusivity rules (such as listed exclusivities) and regulatory requirements for approval pathways. That means a generic or biosimilar-like product still may not be allowed until the later of (a) patent/exclusivity protections and (b) regulatory permissions tied to those protections. The practical “when generics can launch” date is often later than the earliest patent expiry in the portfolio. [1]

Where to find the specific end date for “Eli Lilly’s patent” on Mounjaro

DrugPatentWatch provides a consolidated view of the patents listed for tirzepatide/Mounjaro and their projected expiry timelines, which is the most direct way to get a specific date rather than a general statement. [1]

If you want, share the specific patent number or the exact “expires on” date you’re seeing, and I can help interpret what it covers (drug substance vs. formulation vs. method of use) and how it affects generic entry timing.

Sources

[1] https://www.drugpatentwatch.com/