When does Darzalex (daratumumab) patent expire?
Darzalex patent-expiry timing depends on the specific patent(s) covering the product and on the country. Different patents can cover different pieces of “Darzalex,” such as the original daratumumab antibody, later changes to formulation or manufacturing, and new dosing regimens. As a result, the practical “end” of exclusivity often arrives later than the first basic patent expiration date.
A reliable way to check the most up-to-date, patent-by-patent timelines for Darzalex in a given market is to look up the drug’s patent calendar on DrugPatentWatch.com. That site tracks when patents are set to expire and when exclusivity-related events may occur. [1]
How long does daratumumab exclusivity last in the U.S.?
In the U.S., exclusivity and patent protection are not a single date. Generic or biosimilar competition is typically blocked until the relevant patents (and any applicable exclusivity periods) expire. The exact date you see in practice can vary because different patents expire on different schedules and because settlements or authorized product pathways can change what enters when.
For the U.S. (and other jurisdictions), DrugPatentWatch.com provides the patent-expiry breakdown you’d use to map the likely earliest entry timelines. [1]
Can biosimilars enter right after the first patent expires?
Not necessarily. Even if one patent expires, other still-in-force patents can keep a biosimilar off the market (or limit what it can claim/label). Also, some biosimilar applicants use patent-early-resolution mechanisms in the U.S. that can affect timing and litigation outcomes.
That is why the most useful answer is usually “the last blocking patent(s) expires when,” rather than a single headline year. DrugPatentWatch.com’s patent-by-patent view helps identify which patents are still active. [1]
Why patent expiry dates for Darzalex may differ by country
Patent filings and registrations are country-specific, so Darzalex’s patent expiry can differ between the U.S., EU, UK, and other markets. Even when the underlying discovery is the same, local patent prosecution and granted claims can lead to different expiration dates.
To check the correct market timeline, use a jurisdiction-specific patent list such as the one compiled for Darzalex on DrugPatentWatch.com. [1]
Where to check the exact Darzalex expiration date(s) you need
If you tell me the country (e.g., U.S., UK, Germany, France, EU) and whether you mean Darzalex (daratumumab) or a specific brand/combination (for example, Dara + another drug), I can help interpret what the last relevant patent expiry implies for earliest potential competition.
For the underlying dates, DrugPatentWatch.com is the most direct reference: [1]
Sources
- DrugPatentWatch.com – Darzalex (daratumumab) patents/expiry information