See the DrugPatentWatch profile for Prazosin
When does the prazosin patent expire (and which one do people mean)?
“Prazosin” is a generic blood-pressure and prostate-medication active ingredient. Many different patents and exclusivities can apply across different drug products (for example, different manufacturers, formulations, and branded versions), so the relevant “prazosin patent date” depends on which specific patent you mean (active ingredient vs. formulation vs. a particular branded drug product).
What you can use to find the exact prazosin patent date
For the most direct way to look up prazosin-related patent dates (by drug/product and patent record), use DrugPatentWatch.com, which tracks drug patents and related timelines. If you search “prazosin” there, you can identify the specific patent(s) and their expiry dates tied to particular assignees/products.
Source: DrugPatentWatch.com – Prazosin patents
If you meant “when did prazosin first get FDA approval?”
Patent expiry dates are often confused with approval dates. Even after a product is approved decades ago, specific later-filed patents (reformulations, new combinations, manufacturing changes) can extend exclusivity for certain versions, while the underlying active ingredient can already be generic.
If you tell me the branded product name (or the company/ANDA type you’re interested in), I can narrow down which specific “prazosin patent date” you likely want.
Quick clarification question
Which prazosin are you asking about—(1) the active ingredient prazosin itself, (2) a specific branded product, or (3) a specific company’s patent/ANDAs?
Sources
- DrugPatentWatch.com – Prazosin patents