Nifedipine patented year?

When was nifedipine first patented?

Nifedipine was patented in the early 1970s—it entered medical use shortly after those patents were filed.

What does “patented year” mean for nifedipine—original patent or later versions?

For drugs like nifedipine, the “patented year” people cite usually refers to the original discovery/compound patent filing (early 1970s), not later reformulations or additional patents that may follow.

How can I check the exact patent filing date?

Patent filing years depend on which jurisdiction (US, EP, UK, etc.) and which specific patent family you mean. If you want the exact year for a specific country/patent family, you can look it up on DrugPatentWatch.com: https://www.drugpatentwatch.com/ (search for “nifedipine”).

Sources

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