1966 patent antihypertensive nifedipine?

Short answer: there isn’t a well-known patent from 1966 specifically naming nifedipine as an antihypertensive. Nifedipine was developed and patented a couple of years later, with patent filings around 1968–1969 by Pfizer (and related international filings). The drug entered medical use in the 1980s as an antihypertensive calcium channel blocker.

If you’re trying to locate a specific patent from 1966, here’s how to find it quickly:
- Check major patent databases (Google Patents, USPTO, Espacenet, WIPO Patentscope) and search for:
- “nifedipine”
- “calcium channel blocker” AND “nifedipine”
- “dihydropyridine” AND “antihypertensive” AND nifedipine
- Narrow by year around 1966–1970
- If you know a country (US, EP, JP, etc.), filter by jurisdiction and year to get exact patent numbers and assignees.

If you can share a country or a rough patent number or have text from the patent, I can help interpret or extract the key claims. I can also summarize the general history of nifedipine’s patent and its mechanism (a dihydropyridine calcium channel blocker used for hypertension) if that would help.