Last updated: April 26, 2026
Who manufactures WELLBUTRIN SR and supplies the branded drug?
WELLBUTRIN SR (bupropion hydrochloride extended-release tablets) is supplied in the US as an authorized brand product by Bristol Myers Squibb Company (BMS).
Brand supplier
- Bristol Myers Squibb Company (brand owner and label holder for WELLBUTRIN SR in US labeling records) [1][2]
Which contract/CMO manufacturers supply the finished tablets under the brand?
The public record for WELLBUTRIN SR’s finished-dose manufacturer is typically disclosed in FDA drug-labeling and application documentation. For branded products, the prescribing label commonly identifies the manufacturer of the drug product and the holder/distributor. For WELLBUTRIN SR, the labeling references BMS as the company associated with the product and distributor/label holder, with the manufacturing site(s) controlled within FDA submissions.
From the sources cited below, the brand’s publicly stated responsible party is BMS, which acts as the supplier for commercial distribution of the labeled product [1][2].
Contract manufacturer / CMO detail status
- Publicly accessible excerpts from FDA labeling and related records in the cited sources identify BMS as the responsible supplier party, but do not provide a complete, site-level CMO roster for every marketed strength in those excerpts [1][2].
Who supplies the API used in WELLBUTRIN SR?
WELLBUTRIN SR uses bupropion hydrochloride as the active ingredient. Public labeling sources identify the drug substance as bupropion hydrochloride, but they do not list the API supplier in the cited material. The API supply chain is generally specified in FDA DMF systems and manufacturer disclosures tied to specific sites and application data, which are not enumerated in the cited label excerpts [1][2].
API supplier detail status
- In the cited sources, the API is named as bupropion hydrochloride, but specific API vendor names are not disclosed in the excerpts [1][2].
What you can list today as “suppliers” from public sourcing evidence
| Supplier type |
Supplier |
Evidence in cited sources |
Scope you can state with confidence |
| Brand supplier / label holder |
Bristol Myers Squibb Company |
US labeling/record references |
Commercial branded distribution of WELLBUTRIN SR [1][2] |
| Drug substance |
Bupropion hydrochloride |
Product composition on label |
Confirms API identity, not vendor [1][2] |
| Finished-dose manufacturers (site-level) |
Not enumerated in cited excerpts |
Not provided in cited label extracts |
Cannot name CMO sites from the cited sources alone [1][2] |
| API suppliers (vendor-level) |
Not enumerated in cited excerpts |
Not provided in cited label extracts |
Cannot name API vendors from the cited label excerpts alone [1][2] |
Strengths marketed under WELLBUTRIN SR and what that implies for sourcing
WELLBUTRIN SR is sold in multiple tablet strengths in the US, but supplier identification for each strength depends on site and packaging configuration. The supplier party tied to the labeled product remains BMS in the cited records [1][2].
How these supplier facts map to procurement decisions
- Brand purchase and distribution contracts: treat Bristol Myers Squibb Company as the supplier of record for branded WELLBUTRIN SR under the cited labeling records [1][2].
- Substitution and CMO/API due diligence: if you need vendor-level API and site-level tablet manufacturing, public label excerpts do not provide the vendor list in the cited material; procurement should rely on FDA application and DMF site/vendor fields, or direct supply chain documentation tied to the finished product and drug substance specifications.
Key Takeaways
- Bristol Myers Squibb Company is the branded supplier/label holder for WELLBUTRIN SR in the US labeling records cited here [1][2].
- The active ingredient is bupropion hydrochloride, but the cited sources do not disclose API vendor names or site-level finished-dose manufacturers beyond the label’s responsible party [1][2].
- For vendor-level sourcing (CMOs and API suppliers), label excerpts alone do not provide the needed roster in the cited references.
FAQs
1) Is WELLBUTRIN SR manufactured by Bristol Myers Squibb?
The cited US labeling records identify Bristol Myers Squibb Company as the supplier/label holder for the branded product, but they do not enumerate site-level manufacturing responsibility in the cited excerpts [1][2].
2) Who is the supplier of the branded WELLBUTRIN SR product?
Bristol Myers Squibb Company is the supplier/label holder shown in the cited labeling records [1][2].
3) What is the API for WELLBUTRIN SR?
The active ingredient is bupropion hydrochloride [1][2].
4) Who supplies bupropion hydrochloride (API) for WELLBUTRIN SR?
The cited sources confirm the API identity as bupropion hydrochloride but do not name the API vendor in the cited excerpts [1][2].
5) How do I identify the CMO/finished-dose manufacturing sites for WELLBUTRIN SR?
The cited label sources in this response identify BMS as the responsible party but do not provide the site-level CMO roster in the cited excerpts [1][2].
References
[1] DailyMed. (n.d.). WELLBUTRIN SR (bupropion hydrochloride) extended-release tablets [Labeling]. U.S. National Library of Medicine. https://dailymed.nlm.nih.gov/
[2] U.S. Food and Drug Administration. (n.d.). Drug label / prescribing information records for WELLBUTRIN SR (bupropion hydrochloride) extended-release tablets. https://www.accessdata.fda.gov/
