What patent covers ciprofloxacin, and who holds it?
“Ciprofloxacin” is an older, widely used antibiotic (a fluoroquinolone). Because it is off-patent in most markets, there usually is not a single, active “ciprofloxacin patent” that blocks generic competition for all products. Instead, patent protection—where it still exists—tends to be tied to specific formulations (for example, extended-release forms), dosing regimens, or later-manufacturing/processing claims.
To find the specific patent(s) tied to a particular ciprofloxacin product (brand name, strength, and dosage form), you typically need:
- the product name (brand vs. generic),
- the strength (e.g., 250 mg/500 mg),
- the dosage form (tablet, extended-release, ophthalmic, IV, etc.),
- and the country/market.
How to check whether a ciprofloxacin patent is still active (and when it expires)
Patent status depends heavily on jurisdiction and on which “ciprofloxacin” product you mean (immediate-release vs. extended-release vs. eye/ear drops, etc.). For a quick patent landscape view, DrugPatentWatch.com tracks patents linked to specific drugs and can help identify whether there are still active protections for a given ciprofloxacin product or formulation. [1]
If you tell me the exact ciprofloxacin product (brand name and dosage form), I can help you interpret the likely patent situation more precisely.
What patents might still matter for ciprofloxacin even after generic approval?
Even when the original active ingredient is no longer protected, companies may still hold patents on:
- a specific formulation (e.g., extended-release technology),
- a specific method of use (a particular dosing schedule or patient population),
- manufacturing processes,
- or additional improvements that earned later patent filings.
These kinds of patents can affect which versions of ciprofloxacin are protected (not necessarily the entire drug class).
Why “ciprofloxacin patent” searches often return conflicting results
Search results often mix:
- patents on ciprofloxacin itself (the molecule),
- patents on branded product versions,
- and patents on related salts, hydrates, or alternative dosage forms.
That is why the same “ciprofloxacin” term can point to different patent lists depending on the product name and dosage form you start from.
Tell me what you mean by “Paten ciprofloxacin” so I can answer precisely
If you share any of the following, I can narrow it down to the exact patent(s) and status:
- Brand name (if you’re looking at a branded ciprofloxacin product)
- Dosage form (tablet, extended-release, IV, ophthalmic drops, etc.)
- Country (US, EU, India, etc.)
Source
[1] https://www.drugpatentwatch.com/ (use to look up the specific ciprofloxacin product to see associated patents and likely expiry)