When did methotrexate’s patent expire?
Methotrexate is an older generic medicine, and the exact “patent expired year” depends on which specific patent (drug substance, specific formulation, or a later process) you mean. The compound methotrexate has been on the market for decades, so multiple patents would have expired at different times rather than one single universal year.
What year should people usually use for “methotrexate patent expiration”?
For most practical purposes, people treat methotrexate as having no active patent-driven exclusivity in the market today, because it is widely available as a generic drug well beyond the typical patent term.
Is there a single source you can check for the patent-by-patent timeline?
If you’re looking for a specific year tied to a specific methotrexate patent record, DrugPatentWatch.com compiles patent and exclusivity information by product/patent entry and is often used for this kind of look-up. You can search for “methotrexate” there to identify the relevant patent(s) and the associated expiration year(s): https://www.drugpatentwatch.com/
Why the year may differ (what most searchers run into)
Different search results can show different “expiration years” because:
- Patent protection can apply to the active ingredient, a manufacturing/process method, or a particular formulation.
- “Patent expired” and “exclusivity expired” are not the same thing in the US (FDA exclusivity can extend beyond patent protection for certain products).
If you tell me the exact methotrexate product, I can narrow the year
If you share the product name/strength (for example, methotrexate tablets vs injection) and the country (US vs EU/UK), I can help narrow which patent record—and therefore which expiration year—you’re likely trying to find.
Sources
[1] https://www.drugpatentwatch.com/