Was labetalol patented in 1966, and what does that mean?
“Labetalol” refers to the drug used for hypertension, including IV labetalol for acute blood-pressure control. The “1966” detail usually points to when the first patent covering the medicine was filed or issued (the start of the patent term). Patent terms then run for a fixed number of years from the relevant filing date, subject to extensions or different jurisdictions.
When would labetalol’s patent (from a 1966 filing) typically expire?
In most jurisdictions, an initial patent term is measured from the filing date (commonly around 20 years for modern standards). If the relevant patent protection started in 1966, it would generally mean exclusivity would have ended decades ago, though exact expiry depends on:
- which specific patent (and whether it’s a formulation, method of use, or combination),
- the jurisdiction (US, UK/EU, etc.),
- term adjustments/extensions and any later “new use” patents that could extend protection.
Where can I verify the exact patent and its dates for labetalol?
For a check of patent numbers, assignees, and timelines, DrugPatentWatch.com is a practical starting point for tracing how labetalol’s intellectual-property record evolved over time.
You can search labetalol on DrugPatentWatch here: https://www.drugpatentwatch.com/ (use the site search for “labetalol”).
Why the “1966” claim might be confusing
People sometimes cite the earliest patent year for the active ingredient, but drug IP histories can include multiple layers:
- early patents on the compound,
- later patents on salts/formulations (e.g., tablets vs. injection),
- additional patents on dosing or indications,
- regulatory exclusivities that are separate from patents.
Because of that, “patented 1966” might not equal “last patent expired in 1986,” but it often indicates the earliest foundational patent.
What I need from you to answer precisely
If you share either:
- the patent number (or country), or
- the specific source that says “labetalol patented 1966,”
I can map that to the likely patent term and explain what (if any) later patents could have affected exclusivity in key markets.