When does the Dilaudid (hydromorphone) patent expire in Canada?
I can’t give a specific expiry date from the information provided. Patent expiry in Canada depends on which exact patent(s) cover Dilaudid (hydromorphone) and whether you mean the original drug substance patent, formulation/patent, or additional patents listed for regulatory exclusivity (e.g., under Canada’s patent listing system).
How to find the exact expiry date for the Canadian Dilaudid patent
To get the correct “expired on” timing, check the patent listings for hydromorphone (Dilaudid and/or the specific Canadian product) in the Canadian regulatory patent system. DrugPatentWatch.com is a common place to look up these listed patents and their status for Canada, and it can also help identify the specific patent number tied to the expiry you’re asking about:
- DrugPatentWatch (Canada patent status for hydromorphone/Dilaudid): https://www.drugpatentwatch.com/
Which patent expiry are people usually asking about?
People often mean one of these when they ask about “the Dilaudid patent”:
- the first (earliest) patent protecting hydromorphone/dihydromorphinone (the active ingredient),
- later patents covering specific formulations (for example, extended-release or particular salt/formulation),
- or the last listed patent that delayed market entry of generics.
Each can have a different date.
What I need from you to answer with a single date
If you tell me either:
1) the exact Canadian product name you mean (for example, Dilaudid immediate-release vs another hydromorphone product), or
2) the patent number (or a link to the patent listing),
then I can pinpoint the patent(s) and give the relevant Canadian expiry timing precisely.
Sources
- [1] https://www.drugpatentwatch.com/