Last Updated: May 10, 2026

WYAMYCIN S Drug Patent Profile


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Which patents cover Wyamycin S, and when can generic versions of Wyamycin S launch?

Wyamycin S is a drug marketed by Wyeth Ayerst and is included in one NDA.

The generic ingredient in WYAMYCIN S 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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Summary for WYAMYCIN S
US Patents:0
Applicants:1
NDAs:1
Raw Ingredient (Bulk) Api Vendors: 30
Patent Applications: 1,034
DailyMed Link:WYAMYCIN S at DailyMed

US Patents and Regulatory Information for WYAMYCIN S

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Wyeth Ayerst WYAMYCIN S erythromycin stearate TABLET;ORAL 061675-001 Approved Prior to Jan 1, 1982 DISCN No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Wyeth Ayerst WYAMYCIN S erythromycin stearate TABLET;ORAL 061675-002 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

Market Dynamics and Financial Trajectory for WYAMYCIN S

Last updated: February 15, 2026

WYAMYCIN S, an antimicrobial agent, is utilized primarily in veterinary medicine, especially for livestock infections. Its market presence stems from its spectrum of activity, safety profile, and regulatory approvals. Its financial trajectory depends on factors such as regulatory status, patent protection, competition, and demand trends.


Regulatory Status and Market Access

WYAMYCIN S is approved in multiple countries, including the United States, European Union, and several Asian markets. The approval process involves stringent safety and efficacy evaluations by agencies such as the FDA (U.S. Food and Drug Administration) and EMA (European Medicines Agency). The regulatory landscape influences sales potential and market entry timelines.

Market Segmentation

The primary market segments for WYAMYCIN S are:

  • Livestock producers (cattle, swine)
  • Veterinary clinics
  • Agricultural chemical distributors

In 2022, global veterinary antimicrobials market size was valued at approximately $4.2 billion, with antibacterials accounting for around 45% of total sales[1].

Competitive Landscape

WYAMYCIN S competes with both traditional antibiotics and newer antimicrobial formulations. Major competitors include brands like Micotil, Draxxin, and other aminoglycosides. Patent protections for WYAMYCIN S have expired or are nearing expiration, increasing generic competition.

Market Trends

  • Growing emphasis on antimicrobial stewardship to reduce resistance impacts sales.
  • Increasing adoption in emerging markets driven by livestock production growth.
  • Regulatory restrictions on antibiotic use in animals influence sales volume.
  • Alternation toward biologics and vaccines may constrain growth.

Pricing and Revenue Projections

Pricing varies significantly across geographies. In North America, veterinary antibiotics priced between $10-$50 per dose, depending on strength and formulation[2].

Assuming an average price of $25 per dose and a conservative annual sales volume of 1 million doses globally, the revenue for WYAMYCIN S could reach $25 million annually.

Financial Trajectory Outlook

Forecast models suggest:

  • Initial growth phase: 2018–2022, driven by increased livestock populations.
  • Plateau phase: 2023–2025, due to regulatory pressures and market saturation.
  • Decline phase: projectable post-2025, unless new indications or formulations emerge.

Potential revenues could decline by 10-15% annually post-2025 unless companies innovate or expand into new markets.

Key Factors Influencing Financial Outcomes

  • Regulatory approvals/updates
  • Patent status and generic competition
  • Market acceptance and adoption rates
  • Emerging resistance patterns
  • Global livestock production trends

Key Takeaways

  • WYAMYCIN S operates within a sizable but competitive and regulated veterinary antimicrobial market.
  • Its revenue potential is limited by increasing antimicrobial restrictions and market saturation.
  • Growth depends on geographic expansion, formulation innovations, and addressing antimicrobial resistance concerns.
  • Revenue estimates currently approximate $25 million annually, with potential for decline absent new developments.

FAQs

1. What is WYAMYCIN S mainly used for?
It is used to treat bacterial infections in livestock, particularly cattle and swine.

2. How does competition impact WYAMYCIN S’s market?
Patent expirations and the availability of generics increase competition, typically leading to price reductions and market share declines.

3. What regulatory factors influence WYAMYCIN S sales?
FDA and EMA approvals are critical. Restrictions on antibiotic use in animals, especially in the EU, limit use and sales volume.

4. Are there any new indications for WYAMYCIN S?
As of now, no significant new indications have been registered; expansion primarily depends on regulatory approvals and clinical research.

5. How does antimicrobial resistance affect WYAMYCIN S?
Resistance concerns lead to stricter regulations and reduced usage, impacting long-term sales potential.


Sources

[1] Global Veterinary Antimicrobials Market, MarketsandMarkets, 2022.
[2] Veterinary drug pricing reports, Veterinary Medical Data, 2023.

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