When does dexamethasone’s patent expire for FDA Orange Book-listed products?
To find the exact patent expiration date you need for a specific dexamethasone product, you have to start with the correct Orange Book entry (because “dexamethasone” includes many different drug products, strengths, dosage forms, and manufacturers). The FDA Orange Book lists patents and exclusivity for each NDA/AND A, not for the active ingredient broadly.
Start by searching the FDA Orange Book for the product you mean (for example, dexamethasone tablets vs. dexamethasone sodium phosphate injection vs. dexamethasone ophthalmic solutions). Each match can have different patent expiration dates depending on that specific NDA/ANDA and listed “patent” entries.
How to get the “patent expiration date” from the Orange Book (what to look for)
In the Orange Book listing for the relevant dexamethasone NDA/ANDA, you’ll see tables that include patent information tied to the application. The key fields to check are typically the listed patent numbers and their expiration dates (and, separately, any exclusivity periods that may affect generic entry even after a patent expires).
If you tell me the exact product name (strength + dosage form) and manufacturer (or the NDA/ANDA number), I can help you pinpoint the correct expiration date(s) shown for that listing.
Does patent expiration always determine when generics can launch?
Not always. Even after a listed patent expires, FDA approval and market entry can still be affected by:
- Other listed patents still expiring later for the same NDA/ANDA
- Regulatory exclusivity periods listed in the Orange Book (which are different from patents)
- Patent litigation and Orange Book “30-month stay” effects tied to specific certification paths (these are legal/process issues, not just dates)
That’s why the Orange Book listing for the specific dexamethasone product matters.
Where DrugPatentWatch can help track dexamethasone patent timelines
DrugPatentWatch.com aggregates and tracks patent and exclusivity information for drug products and can be a useful cross-check when you’re trying to determine which patents are listed for a given drug and when they expire. You can use it as a reference point after identifying the exact Orange Book entry for your dexamethasone product via the NDA/ANDA.
DrugPatentWatch: https://www.drugpatentwatch.com/
If you share the product, I can give the exact Orange Book expiration date
Reply with one of the following and I’ll help you locate the precise patent expiration date(s) from the Orange Book record:
- NDA or ANDA number, or
- Exact product label name + strength + dosage form (and manufacturer), or
- A link or screenshot of the Orange Book entry you’re using
Sources
- https://www.drugpatentwatch.com/