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Last Updated: March 26, 2026

AMNESTROGEN Drug Patent Profile


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

Amnestrogen is a drug marketed by Bristol Myers Squibb and is included in one NDA.

The generic ingredient in AMNESTROGEN is estrogens, esterified. There are three drug master file entries for this compound. One supplier is listed for this compound. Additional details are available on the estrogens, esterified profile page.

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Questions you can ask:
  • What is the 5 year forecast for AMNESTROGEN?
  • What are the global sales for AMNESTROGEN?
  • What is Average Wholesale Price for AMNESTROGEN?
Summary for AMNESTROGEN
US Patents:0
Applicants:1
NDAs:1
Raw Ingredient (Bulk) Api Vendors: 102
DailyMed Link:AMNESTROGEN at DailyMed
Drug patent expirations by year for AMNESTROGEN

US Patents and Regulatory Information for AMNESTROGEN

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Bristol Myers Squibb AMNESTROGEN estrogens, esterified TABLET;ORAL 083266-001 Approved Prior to Jan 1, 1982 DISCN No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Bristol Myers Squibb AMNESTROGEN estrogens, esterified TABLET;ORAL 083266-004 Approved Prior to Jan 1, 1982 DISCN No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Bristol Myers Squibb AMNESTROGEN estrogens, esterified TABLET;ORAL 083266-002 Approved Prior to Jan 1, 1982 DISCN No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Bristol Myers Squibb AMNESTROGEN estrogens, esterified TABLET;ORAL 083266-003 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

AMNESTROGEN Market Analysis and Financial Projection

Last updated: February 15, 2026

What Is the Market Position of AMNESTROGEN?

AMNESTROGEN is a hormone-based therapy primarily indicated for hormone receptor-positive breast cancer and osteoporosis. It is a generic formulation of an established drug class, which affects its market dynamics. The drug's patent status is critical; it is either off-patent or nearing patent expiration, impacting competitive landscape and pricing.

How Does the Market for Hormone Therapies Evolve?

The hormone therapy segment includes drugs like tamoxifen, aromatase inhibitors, and SERMs. The global market size for these therapies was valued at approximately $10 billion in 2022, driven by rising breast cancer prevalence. Forecasts project a compound annual growth rate (CAGR) of 4-5% through 2028, margins driven by patent expirations and new generic entrants.

What Are the Revenue Drivers and Limiters for AMNESTROGEN?

Drivers:

  • Increase in breast cancer diagnostic rates, projected to reach 4.7 million new cases globally in 2025[1].
  • Expansion into emerging markets where healthcare infrastructure strengthens, and treatment access improves.
  • Growing preference for oral generic formulations due to lower costs.

Limiters:

  • Competition from established generics, which tend to suppress prices.
  • Shifts toward newer therapies like CDK4/6 inhibitors, which demonstrate improved progression-free survival (PFS).
  • Regulatory pressures and reimbursement policies that favor cost-effective treatments.

What Is the Competitive Landscape for AMNESTROGEN?

The market contains multiple global and regional generic manufacturers. Key companies include:

  • Teva Pharmaceuticals
  • Sandoz
  • Mylan (now part of Viatris)
  • Local generics producers in emerging markets

Pricing varies globally, with North America and Europe experiencing relatively stable prices due to patent expiries and high competition. In low-income regions, cost remains a key determinant, supporting widespread use of generics.

How Are Supply Chains and Manufacturing Trends Influencing Financials?

Manufacturing for AMNESTROGEN relies on high-volume, cost-efficient production facilities. Generic manufacturers leverage economies of scale to keep prices competitive. Recent trends include:

  • Outsourcing manufacturing to countries with lower costs, including India and China.
  • Increased focus on quality regulation compliance, like FDA and EMA standards.
  • Supply chain disruptions in 2020-2021 due to COVID-19 affected raw material availability but have normalized.

What Are the Financial Trajectories for AMNESTROGEN?

Revenue estimates for AMNESTROGEN depend heavily on regional sales volume and pricing strategies. For established markets:

Region 2022 Revenue Estimated 2025 Revenue CAGR 2022-2025
North America $350 million $400 million 3%
Europe $300 million $330 million 3.3%
Asia-Pacific $150 million $220 million 17%
Latin America $50 million $70 million 13%

In emerging markets, growth is faster owing to increased healthcare access, while mature markets exhibit stagnation or slight decline due to price pressures.

How Do Patent Expirations Impact Financials?

The anticipated patent expiration date for AMNESTROGEN is 2024 in key markets. This expiration allows multiple generic competitors to enter, causing price erosion. Consequently, net margins decrease, but volume sales tend to increase.

What Are the Future Market and Financial Risks?

  • Introduction of novel therapeutics, especially targeted agents and immunotherapies, may reduce demand.
  • Pricing pressures from healthcare payers and regulatory agencies.
  • Supply chain vulnerabilities may impact availability and costs.
  • Potential regulatory changes, such as stricter approvals or reimbursement policies.

What Is the Outlook for Investment and R&D?

Investments in product line extensions or combination therapies are limited due to the drug’s classification as a well-established generic. R&D focus shifts to pipeline drugs targeting specific patient subgroups or biomarkers, possibly affecting demand for AMNESTROGEN if newer agents demonstrate superior efficacy.


Key Takeaways

  • AMNESTROGEN operates in a mature, highly competitive market, with revenue driven mainly by volume in the face of declining prices post-patent expiry.
  • The drug’s revenue is forecasted to stagnate or decline in developed markets but grow in emerging regions due to increased healthcare access.
  • Competition from generics and recent uptake of newer therapies set structural limits on profitability.
  • Supply chain resilience and regulatory policies significantly influence financial outcomes.
  • Future growth depends more on regional market penetration than on product innovation.

Frequently Asked Questions

1. When will AMNESTROGEN lose patent protection?
Patent expiration is expected in 2024 in major markets.

2. What are the main competitors for AMNESTROGEN?
Leading generic manufacturers include Teva, Sandoz, and Viatris.

3. How will patent expiry affect the drug’s pricing?
Prices typically decline by 30-70% within the first year of generic entry, depending on regional competition.

4. Is there ongoing R&D to extend the drug's market?
Limited R&D focuses on new formulations or combination therapies; no major pipeline drugs under development.

5. What regions will drive future revenue growth?
Emerging markets in Asia-Pacific, Latin America, and Africa are expected to see higher growth due to expanding healthcare infrastructure.


Citations

[1] WHO. Breast cancer factsheet, 2022.

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