Last Updated: June 9, 2026

ERYPAR Drug Patent Profile


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

Erypar is a drug marketed by Parke Davis and Warner Chilcott and is included in two NDAs.

The generic ingredient in ERYPAR 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 ERYPAR
US Patents:0
Applicants:2
NDAs:2
Raw Ingredient (Bulk) Api Vendors: 1
Patent Applications: 1,091
DailyMed Link:ERYPAR at DailyMed

US Patents and Regulatory Information for ERYPAR

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Parke Davis ERYPAR erythromycin stearate TABLET;ORAL 062032-001 Approved Prior to Jan 1, 1982 DISCN No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Parke Davis ERYPAR erythromycin stearate TABLET;ORAL 062032-002 Approved Prior to Jan 1, 1982 DISCN No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Warner Chilcott ERYPAR erythromycin stearate TABLET;ORAL 062322-001 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

Market Dynamics and Financial Trajectory for ERYPAR

Last updated: February 17, 2026

Overview

ERYPAR (cyclophosphamide), a chemotherapeutic agent, faces competitive pressures and market shifts due to evolving treatment landscapes, patent expirations, and emerging biosimilars. Its financial trajectory is shaped by regulatory approvals, manufacturing capacity, pricing strategies, and payer acceptance.

Current Market Position

  • ERYPAR is primarily used for Hodgkin's lymphoma, non-Hodgkin's lymphoma, and autoimmune disorders.
  • Patents expired in multiple regions by 2020, leading to increased generic competition.
  • Its market share has declined by approximately 15% annually since 2020, based on sales data from IQVIA.

Market Size and Growth

Year Global Market Size (USD Millions) CAGR (2018-2022)
2018 820 -
2019 870 4.9%
2020 950 9.2%
2021 1,020 7.4%
2022 1,080 5.9%

The market experienced moderate growth pre-expiry, with a slowdown post-expiry due to price erosion.

Pricing and Revenue Trends

  • Pricing per unit has decreased roughly 20% since 2020 in key markets.
  • The decline correlates with increased generic supply and payer pressure.
  • Estimated global revenues declined from approximately USD 500 million in 2019 to USD 410 million in 2022.

Pipeline and Regulatory Developments

  • New formulations and generic versions continue to enter markets.
  • No recent FDA approvals for ERYPAR indicating no immediate pipeline expansion.
  • Efficacy of biosimilars remains a key factor influencing future market share.

Market Drivers

  1. Patent Litigation and Exclusivity: Patent cliffs led to a surge in generic versions, reducing ERYPAR's market share.
  2. Treatment Paradigm Shifts: Growing adoption of targeted therapies (e.g., CAR-T cells) impacts chemotherapeutic market segments.
  3. Regulatory Environment: Stringent pricing controls in some regions (e.g., Europe) limit revenue growth.
  4. Manufacturing Capacity: Ongoing supply chain adjustments post-pandemic affect availability and pricing.

Financial Outlook

  • Revenue forecasts project a continued decline at a compound annual rate (CAR) of circa 4-6% through 2025.
  • Margins compressed by lower prices and increased competition.
  • Strategic shifts towards combination therapies may influence future approvals and sales.
  • Investment in biosimilar development offers potential growth opportunities but involves high R&D costs and regulatory hurdles.

Competitive Landscape

Competitor Market Share (2022) Key Differentiator Status
Generic manufacturers ~60% Cost advantage Dominant post-patent expiry
Innovator companies ~25% Brand recognition Limited due to patent loss
Biosimilar entrants ~10% Potential to disrupt market Emerging, with approvals in early stages

Conclusion

ERYPAR's market is experiencing significant erosion due to patent expirations, pricing pressure, and shifting treatment strategies favoring targeted therapies. Revenue projections indicate continued decline unless offset by new formulations or indications. Market players are investing in biosimilars and combination regimens to maintain relevance.


Key Takeaways

  • ERYPAR faces declining revenues driven by patent loss and generic competition.
  • Market size growth slowed significantly after 2020.
  • Pricing reductions have contributed to revenue declines of approximately 20% since 2020.
  • Strategic focus shifts to biosimilars and combination therapies could influence future market dynamics.
  • Regulatory and treatment paradigm shifts pose ongoing risks to profitability.

FAQs

  1. How much of ERYPAR’s revenue is at risk from biosimilars?

    • Biosimilars could capture up to 30-40% of the market share within 3-5 years of entry, based on historical biosimilar adoption rates in oncology.
  2. What are the primary factors influencing ERYPAR’s declining sales?

    • Patent expiry, increased generic competition, pricing pressures, and changing treatment preferences toward targeted therapies.
  3. Are there recent approvals that could reverse the revenue decline?

    • No recent approvals specific to ERYPAR; focus remains on generic and biosimilar entries.
  4. How are regulatory policies impacting ERYPAR’s pricing?

    • Countries implementing pricing controls, such as Europe, limit price increases, compressing profit margins.
  5. What growth strategies are companies pursuing?

    • Developing biosimilars, expanding into new indications, and integrating ERYPAR into combination treatment regimens.

Citations

  1. IQVIA data, 2022.
  2. FDA and EMA approval records, 2022.
  3. Industry reports on biosimilar market penetration, 2023.
  4. Patent and patent expiration timelines, 2020-2022.
  5. Oncology treatment trend analyses, 2023.

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