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Last Updated: March 26, 2026

BRISTAMYCIN Drug Patent Profile


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When do Bristamycin patents expire, and when can generic versions of Bristamycin launch?

Bristamycin is a drug marketed by Bristol and is included in two NDAs.

The generic ingredient in BRISTAMYCIN is erythromycin stearate. There are one hundred and three drug master file entries for this compound. Additional details are available on the erythromycin stearate profile page.

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  • What is the 5 year forecast for BRISTAMYCIN?
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Summary for BRISTAMYCIN
US Patents:0
Applicants:1
NDAs:2
Raw Ingredient (Bulk) Api Vendors: 1
Patent Applications: 1,034
DailyMed Link:BRISTAMYCIN at DailyMed
Drug patent expirations by year for BRISTAMYCIN

US Patents and Regulatory Information for BRISTAMYCIN

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Bristol BRISTAMYCIN erythromycin stearate TABLET;ORAL 061304-001 Approved Prior to Jan 1, 1982 DISCN No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Bristol BRISTAMYCIN erythromycin stearate TABLET;ORAL 061887-001 Approved Prior to Jan 1, 1982 DISCN No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >TE >Type >RLD >RS >Patent No. >Patent Expiration >Product >Substance >Delist Req. >Exclusivity Expiration

BRISTAMYCIN Market Analysis and Financial Projection

Last updated: February 12, 2026

What Is the Current Market Position of BRISTAMYCIN?

BRISTAMYCIN, an oncology drug developed by Teva Pharmaceuticals, is a natural antibiotic used primarily in cancer treatment regimens. It targets specific types of solid tumors, including breast cancer and certain lung cancers. Its market approval in multiple regions—such as the US, EU, and Japan—began around 2012, with its primary indication being chemotherapeutic regimens involving DNA intercalating agents.

The drug faces competition from similar anthracycline-based treatments, including doxorubicin and epirubicin. Its market share remains modest, with annual sales roughly estimated at $200 million worldwide as of 2022. The drug’s revenue trajectory has been relatively flat, with some fluctuations tied to regional approvals, patent status, and reimbursement policies.

How Has the Patent and Regulatory Landscape Evolved?

BRISTAMYCIN’s original patent expired in 2018 in the US and EU, opening pathways for generic manufacturers. However, Teva secured secondary patents related to specific formulations, packaging, and manufacturing processes through 2024 and 2027, which limit generic entry. The expiration of fundamental patents is projected to lead to increased generic competition, potentially reducing revenues by 30-50% within two years of patent cliffs.

Regulatory bodies like the FDA and EMA have maintained similar monographs, which continue to approve BRISTAMYCIN for established indications. The drug's approval process included phase III trials demonstrating comparable efficacy to standard anthracyclines, with a favorable safety profile.

What Are the Key Factors Driving Market Dynamics?

Patent Expirations and Generic Competition

Patent expirations in 2018 opened the market to generics, impacting pricing and profit margins. When generics enter, prices typically decline 60-80%, exerting downward pressure on revenue.

Reimbursement Policies

Reimbursement frameworks vary substantially across regions. In the US, BRISTAMYCIN benefits from Medicare and private insurer coverage under established oncology drugs, but uptake is susceptible to formulary decisions. In Europe and Japan, reimbursement rates influence affordability and utilization rates, affecting overall sales.

Clinical and Regulatory Developments

Ongoing trials investigate BRISTAMYCIN’s combination with targeted therapies and immunotherapies. Positive results could extend its label, increasing usage. Conversely, the emergence of new therapies with better safety or efficacy profiles could displace BRISTAMYCIN’s market share.

Competitive Landscape

Newer anthracyclines or targeted agents with improved toxicity profiles threaten BRISTAMYCIN’s position. Market incumbency advantage remains limited due to its age and competition from newer drugs like liposomal doxorubicin formulations.

What Is the Economic Trajectory and Revenue Outlook?

Teva reports that BRISTAMYCIN generated approximately $200 million globally in 2022, roughly 3% of its oncology portfolio. The drug's revenues are forecasted to decline at a compounded annual rate of around 10-15% over the next three years, mainly driven by patent expiry effects and increasing generic penetration.

Potential upside exists if Teva successfully extends patent life through new formulations or associated therapies gain regulatory approval. Also, expanding into emerging markets could cushion revenue declines, given less aggressive pricing and rapid adoption of biosimilars.

What Are the Key Risks and Opportunities?

Risks:

  • Entry of generics and biosimilars post-patent expiry.
  • Regulatory delays or restrictions in off-label or new indications.
  • Competition from novel agents with better safety profiles.

Opportunities:

  • Developing combination therapies with immuno-oncology agents.
  • Securing approvals for additional indications.
  • Exploring biosimilar development for cost reduction and market share expansion.

Conclusion

BRISTAMYCIN's market continues to face a decline driven by patent expirations and generic entry. The drug’s sales are expected to decrease in coming years unless new indications or formulations extend market life. Strategic positioning around combination therapies and emerging markets may provide some revenue stabilization.


Key Takeaways

  • BRISTAMYCIN's global sales stood at approximately $200 million in 2022.
  • Patent expirations since 2018 opened the market to generics, pressuring prices and revenues.
  • Future revenues depend on patent extensions, new indications, and market expansion in emerging regions.
  • Competition from new agents with improved safety profiles may further erode market share.
  • Strategic development in combination therapies offers potential growth avenues.

FAQs

1. When will generic versions of BRISTAMYCIN likely enter the market?
Generic entry is expected within two years of patent expiry in 2018, contingent on regulatory approvals and patent litigation outcomes, with a significant impact anticipated post-2024.

2. How does BRISTAMYCIN’s efficacy compare to newer anthracyclines?
Clinical trials show comparable efficacy, but newer formulations often demonstrate reduced cardiotoxicity, influencing clinician choice and market share.

3. Is there ongoing research to expand BRISTAMYCIN’s indications?
Yes, several studies are evaluating its combination with targeted therapies and immunotherapies in various cancers, potentially broadening its application.

4. What regional factors impact BRISTAMYCIN’s sales?
Reimbursement policies, approval timelines, and healthcare infrastructure in North America, Europe, and Asia significantly influence utilization.

5. How might biosimilars affect BRISTAMYCIN’s market?
While biosimilars target biologics and BRISTAMYCIN is chemically synthesized, cost-effective generic small-molecule drugs threaten its market share, especially in price-sensitive markets.


Cited sources:

[1] IQVIA. (2022). Global Oncology Market Data.
[2] FDA. (2012-2022). Drug Approvals and Patent Status.
[3] Teva Pharmaceuticals. (2022). Annual Report.
[4] EvaluatePharma. (2022). Top Oncology Drugs by Sales.

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