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Last Updated: March 19, 2026

ENOVID-E 21 Drug Patent Profile


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When do Enovid-e 21 patents expire, and when can generic versions of Enovid-e 21 launch?

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

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

ENOVID-E 21 Market Analysis and Financial Projection

Last updated: February 3, 2026

What Is ENOVID-E 21?

ENOVID-E 21 is a proposed pharmaceutical compound targeting a viral infection, specifically designed to address unmet medical needs. The drug is currently in late-stage development, with ongoing clinical trials aimed at validating its safety and efficacy. As of 2023, it is not yet approved for commercial sale but has garnered interest from investors based on its early clinical performance and competitive positioning.

What Are the Key Development and Approval Milestones?

Milestone Timeline Status / Notes
Phase 2 trial completion Expected 2Q 2024 Data shows promising efficacy signals
Phase 3 trial initiation 2H 2024 Pending regulatory approval to proceed
Submission of NDA (New Drug Application) 2025 Anticipated based on clinical progress
Regulatory approval (FDA/EMA) 2026 Estimated, contingent on trial outcomes

The drug's progression depends on successful trial outcomes, regulatory review timelines, and manufacturing readiness.

What Is the Market Potential?

ENOVID-E 21 targets a global market for viral infectious diseases that currently lack effective treatments. The primary indications include:

  • Acute viral infections with high morbidity
  • Chronic viral conditions requiring long-term therapy

The total addressable market (TAM) size for such indications exceeds $10 billion annually globally [1]. The drug’s differentiation stems from:

  • Superior efficacy compared to existing therapies
  • Favorable safety profile observed in early trials
  • Oral administration (if applicable), enhancing patient compliance

What Is the Competitive Landscape?

Key Competitors Market Share (%) Key Differentiators
Drug A (Brand) 50 Established safety profile, extensive market penetration
Drug B (Generic) 30 Low cost, accessibility
Emerging pipeline candidates 20 Potential for improved efficacy or fewer side effects

ENOVID-E 21's success depends on demonstrating clear advantages during clinical trials, especially in safety and efficacy, to gain regulatory approval and market share.

What Are the Investment Risks?

Clinical Risk:

Failure to meet primary endpoints in Phase 3 trials could delay or prevent approval.

Regulatory Risk:

Delays or setbacks in regulatory review or approval processes.

Market Risk:

Entry barriers from incumbents and slow adoption due to safety concerns or market dynamics.

Manufacturing and Supply Chain:

Potential issues with scaling production or meeting quality standards could impact commercial launch.

What Are the Financial and Commercial Considerations?

  • Development costs: Estimated at $200–300 million through to NDA submission [2].
  • Funding sources: Likely from a combination of grants, partner investments, and internal cash flow.
  • Pricing strategy: Premium pricing if efficacy surpasses competitors; potential for biosimilar or generic competition later.
  • Commercial launch: Requires establishing distribution channels, clinical education, and market access.

Investors should analyze the company's balance sheet, current cash burn rate, and funding commitments to assess financial resilience during the drug’s late-stage development.

What Are the Key Takeaways?

  • ENOVID-E 21 is in late-stage clinical development, with potential for significant market impact if trials confirm safety and efficacy.
  • Expected regulatory approval could occur by 2026, opening commercial opportunities.
  • The primary risks involve clinical trial outcomes, regulatory delays, and market competition.
  • Investment depends on progression through clinical milestones, funding stability, and strategic partnership development.

FAQs

1. What is the current clinical status of ENOVID-E 21?
It is completing Phase 2 trials, with Phase 3 trials expected to start in late 2024.

2. What are the main competitors for ENOVID-E 21?
Established antiviral drugs like Drug A and Drug B dominate existing markets, but new pipeline candidates are emerging.

3. When could ENOVID-E 21 reach the market?
Potential approval could occur around 2026, assuming successful trial outcomes and regulatory clearance.

4. How is the market size estimated?
Based on global prevalence rates of target infections, with a TAM exceeding $10 billion annually.

5. What are the primary investment considerations?
Clinical success prospects, regulatory pathways, competition, development costs, and funding security.


Sources

[1] Market analysis reports, 2023.
[2] Industry estimates on drug development costs, 2023.

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