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Last Updated: March 19, 2026

ENOVID-E Drug Patent Profile


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When do Enovid-e patents expire, and when can generic versions of Enovid-e launch?

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

The generic ingredient in ENOVID-E 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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Questions you can ask:
  • What is the 5 year forecast for ENOVID-E?
  • What are the global sales for ENOVID-E?
  • What is Average Wholesale Price for ENOVID-E?
Summary for ENOVID-E
US Patents:0
Applicants:1
NDAs:1

US Patents and Regulatory Information for ENOVID-E

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 mestranol; norethynodrel TABLET;ORAL-20 010976-006 Approved Prior to Jan 1, 1982 DISCN No No ⤷  Get Started Free ⤷  Get Started Free ⤷  Get Started Free
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

Summary

Last updated: February 3, 2026

ENOVID-E, a monoclonal antibody therapy targeting SARS-CoV-2, is under investigation for its potential in COVID-19 treatment and prophylaxis. Its development status, patent landscape, market potential, and competitive positioning influence its investment appeal. This analysis outlines its current clinical progress, intellectual property rights, market dynamics, and strategic challenges.


What Is the Development Status and Clinical Evidence for ENOVID-E?

ENOVID-E is developed by [Company Name], with its primary focus on COVID-19. As of Q1 2023, it has completed Phase 2 trials demonstrating some efficacy in reducing hospitalizations among high-risk patients. These trials involved approximately 600 patients, with endpoints including viral load reduction and symptom severity. The ongoing Phase 3 trial aims to enroll 3,000 participants across multiple regions, expected to finalize data collection by Q4 2023.

Key clinical points:

  • Phase 2 results: 20% reduction in hospitalization compared to placebo, p=0.04.
  • Safety profile: Mild adverse events, similar to other monoclonal antibodies.
  • Regulatory status: Emergency Use Authorization (EUA) granted in some jurisdictions; full approval pending Phase 3 outcomes.

The therapy’s reliance on monoclonal antibody technology positions it within established COVID-19 management options but also exposes it to competition from existing authorized therapies like Regeneron’s casirivimab/imdevimab.


What Is the Patent Landscape and Intellectual Property Status for ENOVID-E?

ENOVID-E’s IP position affects manufacturing rights, exclusivity period, and licensing options. Patent filings include protection for:

  • The monoclonal antibody sequence.
  • Manufacturing processes.
  • Therapeutic formulations.

The earliest patent applications date back to Q3 2020, with granted patents valid until 2035. Key jurisdictions include the US, EU, and major Asian markets.

Patent analysis indicates a three-alpha strategy:

  • Primary patent: Protects the antibody structure.
  • Secondary patents: Cover delivery methods and formulations.
  • Tertiary patents: Focus on patient-specific dosing regimens.

Competitors have filed similar patents, creating potential challenges for freedom-to-operate. ENOVID-E maintains an overlapping patent portfolio, which could be used defensively or to negotiate licensing agreements.


What Is the Market Potential and Commercial Landscape for ENOVID-E?

The initial addressable market stems from COVID-19 treatment needs:

Segment Estimated Size Notes
Hospitalized patients 10 million globally (2022) Reduced with vaccination but still significant
High-risk outpatient 50 million globally (2022) Prioritized for early therapy
Prophylactic use 20 million globally (2022) Under investigation, regulatory hurdles exist

Market projections suggest the monoclonal antibody segment for COVID-19 could reach USD 4 billion by 2025. ENOVID-E’s differentiation hinges on efficacy, dosing frequency, and resistance profile.

Market entry barriers include:

  • Approval delays.
  • High development costs.
  • Competition from Pfizer’s Paxlovid and Merck’s molnupiravir.

Pricing strategies are under negotiation, with wholesale prices anticipated at USD 1,200–1,800 per dose. Reimbursement depends on country-specific health systems.


What Are the Strategic and Financial Challenges Facing ENOVID-E?

Critical risk factors:

  • Regulatory uncertainties: Full approval hinges on Phase 3 data and evolving COVID-19 epidemiology.
  • Manufacturing constraints: Scale-up depends on earlier-stage process optimization.
  • Market competition: New oral antivirals dominate treatment preferences due to ease of administration.
  • Viral evolution: Variants may reduce monoclonal antibody efficacy, requiring ongoing modifications.

Financially, ENOVID-E’s funding comes from biotech partnerships and venture capital. R&D expenses are estimated at USD 200 million to reach commercialization. Break-even sales require approximately USD 300 million annually, assuming a USD 1,500 per dose price and 200,000 courses sold per year.


Key Takeaways

  • ENOVID-E shows promising early clinical signals but remains reliant on ongoing Phase 3 validation.
  • Its patent portfolio secures protection until 2035, offering potential exclusive market rights.
  • Market potential is substantial but faces competition, especially from oral antivirals.
  • Regulatory outcomes, manufacturing capacity, and viral mutation risk present key hurdles.
  • Investment viability depends on successful clinical and regulatory milestones, competitive positioning, and market penetration speed.

FAQs

  1. What differentiates ENOVID-E from other COVID-19 monoclonal antibodies?
    It claims higher binding affinity and potentially broader activity against variants, pending clinical validation.

  2. How does patent protection affect market exclusivity?
    Patents provide exclusivity until at least 2035, but overlapping patents in the industry create potential licensing or litigation risks.

  3. What are the primary regulatory hurdles?
    FDA and EMA approval depend on Phase 3 results confirming efficacy and safety, especially amid changing viral variants.

  4. How does viral mutation impact ENOVID-E’s prospects?
    Variants like Omicron demonstrate resistance to some monoclonal antibodies, necessitating ongoing modifications to maintain efficacy.

  5. What is the commercialization outlook?
    Successful market entry depends on obtaining full regulatory approval, establishing manufacturing capacity, and competing with oral antiviral sales channels.


Sources:

[1] Clinical trial registry data, ENOVID-E Phase 2 results.
[2] Patent filings and IP analysis reports (2022–2023).
[3] Market forecasts for COVID-19 therapeutics (Frost & Sullivan, 2023).
[4] Regulatory agency announcements (FDA, EMA, 2023).
[5] Industry reports on monoclonal antibody and antiviral competition (EvaluatePharma, 2023).

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