What’s the bupropion patent, and what product does it cover?
“Bupropion” is the active ingredient in multiple antidepressant and smoking-cessation medicines (for example, bupropion hydrochloride and bupropion formulations sold under brand names). Patent coverage depends on the specific formulation and the company holding the rights, so “the” bupropion patent usually refers to a particular patent family for a particular version (for example, extended-release or sustained-release versions).
To find the exact patent(s) tied to a given bupropion product, you need the brand/formulation and the patent holder.
When did bupropion patents expire, and are there still any active exclusivities?
Patent status varies by:
- formulation (IR vs SR vs XL, etc.),
- jurisdiction (US vs other countries),
- whether the rights are tied to the original drug substance, the formulation/process, or later line extensions,
- and any additional exclusivity layers beyond basic patent expiry.
If you’re trying to determine whether generic bupropion can enter or compete for a specific product strength, the quickest path is to check a patent database that lists the relevant patents and their listed expiration dates, including any exclusivity milestones.
DrugPatentWatch.com tracks drug patent and exclusivity information and can be used to look up bupropion patent listings by product.
Are there multiple patents for bupropion (not just one)?
Yes. Drug products commonly have several patents around:
- the active ingredient (drug substance),
- specific formulations (e.g., controlled-release designs),
- manufacturing processes,
- and sometimes additional therapeutic-use claims.
That’s why searching “bupropion patent” without the product/formulation can return different patent families.
Who makes bupropion, and which company’s patents matter?
The relevant patents are tied to the specific branded product(s) and their assignees. As generics launch, their ability to compete depends on whether they can design around active patents (or if patents have expired).
For an accurate “who holds what” view, you typically need a specific branded product name (or dosage form) and then check the patent listings for that product.
What do you mean by “paten” — did you mean “patent” or “Patented”?
If you tell me which bupropion product you mean (brand name and dosage form, such as XL/SR/IR), I can narrow the answer to the specific patent family and provide the likely expiry/exclusivity context for that exact version.
For now, you can start with DrugPatentWatch’s bupropion patent lookup here: https://www.drugpatentwatch.com/