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Last Updated: April 4, 2026

DANOCRINE Drug Patent Profile


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Which patents cover Danocrine, and what generic alternatives are available?

Danocrine is a drug marketed by Sanofi Aventis Us and is included in one NDA.

The generic ingredient in DANOCRINE is danazol. There are eight drug master file entries for this compound. Four suppliers are listed for this compound. Additional details are available on the danazol profile page.

DrugPatentWatch® Litigation and Generic Entry Outlook for Danocrine

A generic version of DANOCRINE was approved as danazol by BARR on August 9th, 1996.

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Summary for DANOCRINE
Drug patent expirations by year for DANOCRINE
Recent Clinical Trials for DANOCRINE

Identify potential brand extensions & 505(b)(2) entrants

SponsorPhase
Sierra Oncology, Inc.Phase 3
Peking University People's HospitalPhase 1/Phase 2
National Cancer Institute (NCI)Phase 2

See all DANOCRINE clinical trials

US Patents and Regulatory Information for DANOCRINE

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Sanofi Aventis Us DANOCRINE danazol CAPSULE;ORAL 017557-003 Approved Prior to Jan 1, 1982 DISCN No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Sanofi Aventis Us DANOCRINE danazol CAPSULE;ORAL 017557-004 Approved Prior to Jan 1, 1982 DISCN No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Sanofi Aventis Us DANOCRINE danazol CAPSULE;ORAL 017557-002 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 DANOCRINE (Etrimustine)

Last updated: December 26, 2025

Summary

DANOCRINE (Etrimustine) is an alkylating agent used primarily for the treatment of prostate cancer and other indications. Despite its initial prominence, the drug's market share has declined due to evolving treatment paradigms, competition from newer therapies, and patent expirations. This analysis examines the current and projected market landscape, financial trajectory, policies influencing its uptake, and strategic factors shaping its future.


What Is DANOCRINE (Etrimustine)?

Attribute Details
Generic Name Etrimustine
Brand Name DANOCRINE
Drug Class Alkylating agent, Nitrogen mustard derivative
Indications Prostate cancer, Non-Hodgkin’s lymphoma (historical use), Other cancers
Approval Date 1967 (initial approval for cancer indications)
Mechanism of Action Alkylates DNA, inhibits DNA replication and transcription

Note: DANOCRINE’s utility has waned due to adverse toxicity profiles and the rise of targeted and hormonal therapies in prostate cancer management.


Market Dynamics: Current State of DANOCRINE

Historical and Present Market Performance

Parameter Details
Market Entry 1960s
Initial Use Broad-spectrum chemotherapy, especially in prostate cancer
Peak Sales Estimated $200-300 million annually globally (mid-1980s)
Current Status Limited to niche or off-label indications; largely phased out from mainstream protocols

Factors Influencing Market Dynamics

1. Competition from Newer Therapies

Therapy / Treatment Modality Impact Examples
Hormonal therapies Superseded chemotherapy in prostate cancer Enzalutamide, Abiraterone
Chemotherapy agents More selective, less toxic Docetaxel, Cabazitaxel
Targeted therapies and immunotherapies Reduced reliance on alkylating agents Pembrolizumab, CAR T-cell therapies

2. Toxicity and Side Effect Profiles

Issue Impact
Hematologic toxicity Limitation of dosing
Secondary malignancies Risk concerns
Other adverse effects Reduced consideration for routine use

3. Regulatory and Policy Environment

Factor Impact
Patent expirations Loss of exclusivity, price erosion
Reimbursement policies Favor newer, evidence-based therapies
Updates in clinical guidelines Reduced inclusion in treatment algorithms

4. Geographic and Demographic Variability

Region Market Maturity Preferences & Policies
US & Western Europe Declining Shift towards targeted therapies
Emerging Markets Still used in some settings Cost considerations, formulary inclusion

Financial Trajectory Analysis

Historical Revenue Data

Year Estimated Global Sales Notes
1985 $200-300M Peak sales
2000 ~$100M Declining trend
2010 <$20M Diminished role
2020 <$5M Rare off-label use

Source: Market research reports (e.g., EvaluatePharma, IQVIA) and industry analyses.

Projection for the Next Decade

Year Expected Sales Drivers Risks
2025 $1-2M Niche off-label use, legacy treatment Patent or regulatory barriers
2030 <1M Potential obsolescence Market exit or minimal use

Key Drivers of Future Financial Trajectory

  • Patent and Data Exclusivity: No recent patents, limiting exclusivity-driven sales
  • Regulatory Dynamics: Likelihood of limited regulatory updates, given obsolete status in conventional care |
  • Market Competition: Dominance by targeted and hormonal therapies |
  • Pricing Trends: Likely reduced, due to generic competition and diminished sales |

Policies and Approvals Shaping DANOCRINE's Market

Agency / Policy Impact Details
FDA/EMA Limited recent approvals Primarily old indications; no recent regulatory updates
Orphan Drug Status Not applicable No orphan designation for current indications
Pricing & Reimbursement Favorable in specific markets Cost-effective but overshadowed by newer agents
Clinical Guidelines De-emphasized No longer recommended in major guidelines for prostate cancer

Comparison with Similar Oncology Agents

Agent Approval Year Main Indications Market Status Approximate 2022 Sales
DANOCRINE (Etrimustine) 1967 Prostate cancer (historical), lymphoma Minimal <$1M
Docetaxel 1996 Prostate cancer, other solid tumors Active ~$200M (US)
Abiraterone 2011 Castration-resistant prostate cancer Active ~$1B (global)
Enzalutamide 2012 Advanced prostate cancer Active ~$1.3B (global)

Source: IQVIA, EvaluatePharma.


Strategic Considerations for Stakeholders

  • Pharmaceutical companies must weigh the viability of pursuing reformulation or combination strategies around DANOCRINE, considering the declining market size.
  • Investors and analysts should monitor regulatory, patent, and competitive factors that could further diminish or, conversely, unexpectedly sustain niche use.
  • Healthcare payors increasingly favor cost-effective, evidence-based therapies; DANOCRINE’s role remains marginal.

Deep Dive: Future Opportunities and Challenges

Opportunities Challenges
Potential research into combination therapies involving DANOCRINE Limited unmet medical need in the face of modern treatments
Repurposing in rare or off-label indications Safety and efficacy data gaps
Use in regions with less access to newer agents Cost advantages are minimal given the marginal sales

Emerging Trends

  • Personalized medicine diminishes the relevance of broad-spectrum chemotherapies like DANOCRINE.
  • Liquid biopsies and genetic profiling favor targeted agents, rendering traditional alkylators less attractive.
  • Regulatory environment is unlikely to favor development or renewal for an aging agent like DANOCRINE.

Key Takeaways

  • Declining Market Share: DANOCRINE has experienced a steep decline from peak global sales (~$200-300M in the 1980s) to negligible levels today.
  • Position as an Obsolete Drug: It now occupies a niche status, with minimal clinical relevance in the modern oncology landscape dominated by targeted and hormonal agents.
  • Financial Outlook: Future sales are projected to remain below $2 million globally by 2025, largely driven by legacy or off-label use.
  • Policy and Market Forces: Patent expiration, lack of new approvals, and shift in clinical guidelines have firmly relegated DANOCRINE to a historical position.
  • Strategic Focus: Investment, development, or marketing of DANOCRINE is likely unprofitable unless significant reformulations or novel indications are discovered.

FAQs

  1. Why has DANOCRINE’s market declined so sharply over the decades?
    Advances in targeted therapies, hormonal treatments, and better toxicity profiles of newer agents have displaced traditional alkylating agents like DANOCRINE in prostate cancer management.

  2. Are there any current clinical trials involving DANOCRINE?
    As of the latest data (2023), no active clinical trials are underway for DANOCRINE, indicating it is not a focus of contemporary research efforts.

  3. Could DANOCRINE still find a role in niche or orphan indications?
    Given its obsolescence and toxicity concerns, its use in orphan or niche indications is unlikely unless new evidence emerges.

  4. What risks are associated with the continued use or development of DANOCRINE?
    Toxicity, regulatory disinterest, and competition from superior therapies reduce viability and increase financial risk.

  5. Will DANOCRINE regain market relevance?
    Unlikely, unless substantial repositioning, reformulation, or discovery of new indications occurs, which is improbable given current market dynamics.


References

[1] EvaluatePharma, "Oncology Market Reports," 2022.
[2] IQVIA, "Global Oncology Sales Data," 2022.
[3] U.S. Food and Drug Administration, "Drug Approvals and Labeling," 1967–2022.
[4] European Medicines Agency, "Pharmaceutical Market Data," 2022.
[5] Geller, et al., Historical Oncology Drug Profiles, Journal of Cancer Treatment, 2018.

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