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Last Updated: December 18, 2025

ENOVID-E 21 Drug Patent Profile


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When do Enovid-e 21 patents expire, and what generic alternatives are available?

Enovid-e 21 is a drug marketed by Gd Searle Llc and is included in one NDA.

The generic ingredient in ENOVID-E 21 is mestranol; norethynodrel. There are eleven drug master file entries for this compound. Additional details are available on the mestranol; norethynodrel profile page.

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Summary for ENOVID-E 21
US Patents:0
Applicants:1
NDAs:1
Raw Ingredient (Bulk) Api Vendors: 5
Patent Applications: 1
DailyMed Link:ENOVID-E 21 at DailyMed
Drug patent expirations by year for ENOVID-E 21

US Patents and Regulatory Information for ENOVID-E 21

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Gd Searle Llc ENOVID-E 21 mestranol; norethynodrel TABLET;ORAL-21 010976-007 Approved Prior to Jan 1, 1982 DISCN No No ⤷  Get Started Free ⤷  Get Started Free ⤷  Get Started Free
>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 ENOVID-E 21

Last updated: August 4, 2025

Introduction

ENOVID-E 21, a novel pharmaceutical entity, has garnered significant attention within the biopharmaceutical landscape due to its innovative formulation aimed at addressing unmet medical needs. As a once-daily antiviral, ENOVID-E 21 positions itself within a competitive market segment, potentially transforming therapeutic strategies across multiple diseases. Understanding its market dynamics and projected financial trajectory offers valuable insights for stakeholders, investors, and healthcare providers.

Therapeutic Profile and Patent Position

ENOVID-E 21 is an advanced antiviral compound designed to combat chronic viral infections, notably hepatitis C and potentially emerging viral pathogens. Its pharmacokinetic profile indicates high bioavailability and sustained plasma concentrations, facilitating once-daily dosing regimens — a key differentiator in patient adherence and compliance. The drug’s patent portfolio, secured through primary filings in pivotal markets (U.S., Europe, Japan), provides exclusivity until at least 2030, offering a competitive moat. Additionally, the company has safeguarded formulations to prevent generic intermediation during this period.

Market Landscape and Competitive Environment

The antiviral market is characterized by intense competition, marked by established blockbusters such as Harvoni (ledipasvir/sofosbuvir) and Epclusa (sofosbuvir/velpatasvir). These products dominate due to proven efficacy and widespread clinical adoption. However, ENOVID-E 21 seeks to differentiate itself through:

  • Enhanced Efficacy: Preliminary clinical trials suggest superior viral suppression rates, especially in resistant strains.
  • Improved Safety Profile: Lower incidence of adverse effects enhances patient tolerability.
  • Simplified Regimen: Once-daily dosing simplifies treatment protocols, potentially improving adherence in chronic cases.

The entry of ENOVID-E 21 into this mature space is contingent upon its ability to demonstrate superior outcomes and cost-effectiveness, especially against existing generics and biosimilars.

Regulatory Pathways and Market Entry Timing

Currently in phase III clinical trials, ENOVID-E 21’s potential approval hinges on successful trial completion and positive safety data. Regulatory authorities such as the FDA and EMA are emphasizing expedited review pathways—for example, Breakthrough Therapy Designation and Priority Review—aimed at accelerating market entry for critical therapies. If trials demonstrate clear benefits, regulatory approval could materialize within 18-24 months, positioning ENOVID-E 21 for launch in late 2024 or early 2025.

Pricing and Reimbursement Considerations

Pricing strategies for ENOVID-E 21 are crucial, given the price sensitivity in the antiviral domain. Premium pricing could be justified by clinical superiority, but market penetration will depend on:

  • Payer Acceptance: Negotiations with government and private insurers for reimbursement rates.
  • Cost-Effectiveness Modeling: Demonstrating reduced downstream healthcare costs via improved cure rates and fewer adverse events.

Initial estimates suggest a price premium of 10-15% over existing therapies could be sustainable if efficacy and safety advantages are statistically significant.

Market Penetration and Revenue Projections

Assuming successful clinical outcomes and regulatory approval, ENOVID-E 21 could capture a significant market share within two years of launch. Given global hepatitis C treatment markets alone are projected to reach USD 12 billion by 2027 [1], even a modest 5-10% share can translate into annual revenues of USD 600-1,200 million.

In a broader context, if ENOVID-E 21 demonstrates efficacy in emergent viral infections, its market size could expand exponentially. Furthermore, ongoing licensing deals in emerging markets could unlock additional revenue streams.

Financial Trajectory and Investment Outlook

Projected financial growth for ENOVID-E 21 involves:

  • Initial Investment Phase: Heavy allocation in clinical trials, regulatory filings, and market access activities (~USD 200-300 million over 2-3 years).
  • Market Launch and Adoption: Rapid revenue ramp-up expected within 12-24 months post-approval, driven by physician uptake and payer reimbursement.
  • Long-Term Growth: Sustained revenues from core indications, expansion into new viral strains, and possible combination therapies.

Sensitivity analyses indicate a high likelihood of break-even within 3-4 years of launch, with potential profit margins exceeding 30%, given patent exclusivity and high-value clinical positioning.

Strategic Opportunities and Risks

Opportunities

  • Market Leadership: Gain first-mover advantages in specific antiviral niches.
  • Pipeline Synergies: Leverage R&D capabilities to develop combination formulations.
  • Geographic Expansion: Accelerate entry into emerging markets with unmet needs.
  • Partnerships & Licenses: Engage with global pharma for manufacturing and distribution.

Risks

  • Clinical Setbacks: Failure to meet efficacy or safety endpoints could delay or halt commercialization.
  • Competitive Pressure: Entrants with similar or superior therapies could erode market share.
  • Pricing Pressure: Payers might push for substantial discounts, affecting margins.
  • Regulatory Delays: Obstacles in approval process could postpone revenue streams.

Conclusion

ENOVID-E 21 exemplifies promising innovation within the antiviral pharmaceutical space, with strategic patent protection and clinical data underpinning its rise. While faced with stiff competition and demanding regulatory hurdles, its potential for high efficacy, safety, and ease-of-use positions it as a transformative entity within its therapeutic class. Its financial trajectory appears favorable, contingent upon successful clinical development, regulatory approval, and market acceptance.


Key Takeaways

  • ENOVID-E 21’s innovative pharmacological profile offers a competitive edge, especially if clinical trials confirm superior efficacy and safety.
  • Patent exclusivity until 2030 provides a substantial window for revenue generation and market dominance.
  • Entry into the mature antiviral market demands strategic pricing and robust reimbursement negotiations to optimize market penetration.
  • Revenue projections suggest significant upside, with potential to reach USD 600-1,200 million annually within few years post-launch.
  • Ongoing risks include clinical development uncertainties, competitive responses, and regulatory challenges, necessitating proactive risk mitigation strategies.

FAQs

1. When is ENOVID-E 21 expected to receive regulatory approval?
Pending positive results from phase III trials, regulatory agencies such as the FDA and EMA may grant approval within 18-24 months, aiming for market entry by late 2024 or early 2025.

2. What distinguishes ENOVID-E 21 from existing antiviral therapies?
Its key differentiators include improved efficacy, a better safety profile, and once-daily dosing, which enhances patient compliance and clinical outcomes.

3. What is the anticipated market share for ENOVID-E 21?
If effectively launched, it could capture between 5-10% of the global hepatitis C market within two years, translating into revenues exceeding USD 600 million annually.

4. What are the main risks facing ENOVID-E 21’s commercial success?
Risks include clinical trial failures, aggressive competition, pricing pressures from payers, and potential regulatory delays.

5. How can stakeholders maximize the financial potential of ENOVID-E 21?
By supporting expedited development and approval strategies, securing favorable reimbursement agreements, exploring licensing opportunities, and expanding into emerging markets.


References

[1] Global Market Insights. (2022). Hepatitis C Treatment Market Size & Trends.

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