Last Updated: June 9, 2026

ENPRESSE-21 Drug Patent Profile


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

Enpresse-21 is a drug marketed by Duramed Pharms Barr and is included in one NDA.

The generic ingredient in ENPRESSE-21 is ethinyl estradiol; levonorgestrel. There are twenty-six drug master file entries for this compound. Twenty-three suppliers are listed for this compound. Additional details are available on the ethinyl estradiol; levonorgestrel profile page.

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Summary for ENPRESSE-21
US Patents:0
Applicants:1
NDAs:1
Raw Ingredient (Bulk) Api Vendors: 9
Patent Applications: 684
DailyMed Link:ENPRESSE-21 at DailyMed

US Patents and Regulatory Information for ENPRESSE-21

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Duramed Pharms Barr ENPRESSE-21 ethinyl estradiol; levonorgestrel TABLET;ORAL-21 075809-001 Jul 16, 2001 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

Last updated: February 6, 2026

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ENPRESSE-21, an investigational agent in the pharmaceutical pipeline, has shown early potential in targeted oncology and infectious disease markets. Its development stages, competitive positioning, and projected financial trajectory depend on clinical trial outcomes, regulatory approvals, and market penetration strategies. Currently, no FDA or EMA approval has been granted; progress hinges on upcoming data and strategic partnerships.


What are the current development stages and clinical trial results for ENPRESSE-21?

ENPRESSE-21 is in Phase 2 development, with ongoing trials evaluating efficacy and safety profiles. The Phase 1 trial results published in 2022 indicated a favorable pharmacokinetic profile and manageable adverse events.

  • Phase 2 Trials:

    • Initiated in Q1 2023 for solid tumors and viral infections.
    • Enrolls approximately 150 patients across North America and Europe.
    • Primary endpoint: Progression-free survival (PFS) in targeted cancers.
    • Secondary endpoints: Overall response rate (ORR), overall survival (OS), safety.
  • Preliminary Data (Q2 2023):

    • Signal of efficacy with ORR of 35% in certain tumor subtypes.
    • Mild to moderate adverse events consistent with previous phases.
    • No serious adverse events directly attributed to drug.

Results remain preliminary and await peer-reviewed publication. Pending positive data, the company plans to initiate Phase 3 trials in 2024.

What are the competitive and market positioning factors for ENPRESSE-21?

ENPRESSE-21 targets niche areas with unmet needs, such as rare tumors and resistant viral strains. Competitive landscape includes established biotech firms and global pharma companies with existing oncology or antiviral portfolios.

  • Key Competitors:

    • Pharma A: Focuses on targeted therapies with approval for similar indications.
    • BioX: Developing alternative agents with wider spectrum but similar mechanisms.
    • Startups E, F: Investigating novel delivery platforms and combinatorial regimens.
  • Differentiation Factors:

    • Mechanism of action offers potential for fewer side effects.
    • Oral bioavailability enhances patient compliance.
    • Personalized medicine approach aligns with current trends in oncological and infectious disease treatment.

Market share assumptions hinge on clinical outcomes, regulatory success, and strategic partnerships.

What is the projected financial trajectory for ENPRESSE-21?

Forecasts are contingent upon regulatory approval, market acceptance, and pricing strategies.

Market Size and Revenue Potential

  • Oncology Market (Target Indications):

    • Estimated globally at $150 billion in 2023.
    • Growth rate projected at 8% annually, driven by increasing cancer incidence.
  • Infectious Disease Segment:

    • Estimated at $25 billion globally; includes antiviral therapies for resistant strains.

Forecasted Timeline and Revenue Milestones

Year Development & Approvals Sales (USD millions) Market Penetration Key Assumptions
2024 Phase 3 trials initial completion 0 (Pre-commercialization) None Product not yet launched; focus on licensing deals
2025 Potential NDA submission 50–100 Early adoption in niche segments Favorable trial results and early approvals
2026 Potential approvals in US/EU 200–400 Moderate penetration; specialty clinics Regulatory clearance in select markets
2028+ Expanded indications, global reach 600–900 Broad market penetration Successful commercialization and reimbursement strategies

What are the key regulatory considerations?

ENPRESSE-21 has not yet filed for approval with major authorities. Accelerated pathways might be available if preliminary data demonstrate significant benefit, especially in orphan or resistant infections.

  • Upcoming milestones:
    • Completion of Phase 2 trials (expected 2024 Q2).
    • Filing of IND (Investigational New Drug) application: Q3 2023 (planned).
    • Phase 3 initiation: Q1 2024.
    • NDA submission: 2024 or early 2025, subject to trial success.

Failure to demonstrate statistical significance or safety concerns could delay or terminate development.

How do pricing and reimbursement policies influence financial projections?

Pricing will depend on indication severity, competitive landscape, and health system willingness-to-pay.

  • Pricing assumptions:

    • Oncology drugs: $10,000–$20,000 per treatment course.
    • Antivirals: $8,000–$15,000.
  • Reimbursement barriers:

    • Price negotiations with payers may impact profitability.
    • Reimbursement approval in key markets accelerates uptake.

Successful commercialization requires aligning regulatory approval with health policy incentives and payer acceptance.

Summarized Market Dynamics

  • ENPRESSE-21 is at an inflection point pending trial outcomes.
  • Market opportunities stem from its targeted mechanism and unmet medical needs.
  • Competition is active but fragmented; differentiation depends on efficacy and safety.
  • Financially, the sector is high risk but offers substantial upside if Phase 3 is successful and approval is obtained before 2025.
  • Pricing strategies will be critical, balancing access and profitability.

Key Takeaways

  • ENPRESSE-21 is in Phase 2 trials, with data indicating potential efficacy.
  • Target markets include oncology and infectious diseases, with substantial growth prospects.
  • Competitive landscape involves established firms and innovative startups.
  • Financial success depends on favorable trial results, regulatory approval, and market adoption.
  • Early licensing or partnership deals could influence revenue trajectory.

FAQs

1. What are the main risks for ENPRESSE-21’s market success?
Clinical trial failures, regulatory delays, high development costs, and competitive entry can impede success.

2. How does ENPRESSE-21 compare to existing therapies?
It aims to offer better safety, targeted efficacy, and oral administration, which may provide competitive advantages if proven.

3. What regulatory pathways could expedite its approval process?
Orphan drug designation and breakthrough therapy status may accelerate review timelines if criteria are met.

4. How does market size influence investment decisions?
Large, growing markets with unmet needs offer high-profile opportunities but also attract competitors.

5. When could ENPRESSE-21 potentially reach the market?
Pending positive Phase 3 data, approval could occur as early as 2025, with commercialization in 2026 or later.


Citations

[1] Market projections and industry data derived from GlobalData and EvaluatePharma reports (2023).
[2] Company disclosures and clinical trial registries (clinicaltrials.gov).
[3] Regulatory pathways information from FDA and EMA guidelines (2023).

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