What Is a Patent Cliff?
The patent cliff explained — why billions in drug revenue disappear when patents expire, and what it means for patients and investors.
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Plain-English guides to drug patents, exclusivity, and the patent cliff — from USPTO and FDA data.
How Long Do Drug Patents Last in the US?
20 years from filing — but effective market exclusivity is much shorter. Here is how patent term, extensions, and regulatory exclusivity work.
Read guide →Loss of Exclusivity vs. Patent Expiry
Patent expiry and loss of exclusivity are not the same thing. One is a legal term, the other determines when generics actually enter.
Read guide →Paragraph IV Certification Explained
How generic manufacturers challenge drug patents — the ANDA process, 30-month stay, and 180-day exclusivity.
Read guide →The FDA Orange Book Explained
The official database of approved drugs, their patents, and exclusivity periods — how to read it and what it means.
Read guide →Biosimilars vs. Generics
Why biosimilars cost more, take longer to develop, and produce smaller price drops than traditional generics.
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