Last Updated: June 17, 2026

DAYPRO Drug Patent Profile


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When do Daypro patents expire, and what generic alternatives are available?

Daypro is a drug marketed by Pfizer and is included in two NDAs.

The generic ingredient in DAYPRO is oxaprozin potassium. There are thirteen drug master file entries for this compound. Additional details are available on the oxaprozin potassium profile page.

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Summary for DAYPRO
US Patents:0
Applicants:1
NDAs:2

US Patents and Regulatory Information for DAYPRO

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Pfizer DAYPRO oxaprozin TABLET;ORAL 018841-004 Oct 29, 1992 AB RX Yes Yes ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Pfizer DAYPRO ALTA oxaprozin potassium TABLET;ORAL 020776-001 Oct 17, 2002 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

Analysis of the Investment Scenario, Market Dynamics, and Financial Trajectory for DAYPRO

Last updated: February 3, 2026

Summary

DAYPRO, an NSAID (Nonsteroidal Anti-Inflammatory Drug) indicated primarily for osteoarthritis and acute pain, presents a complex investment profile. As of 2023, its market presence is marked by patent expiry, generic competition, and evolving regulatory landscapes. Despite plateauing revenues, strategic growth can be driven through reformulation, broader indications, and emerging markets. This report evaluates development prospects, competitive landscape, market demand, financial forecasts, and investment considerations for DAYPRO.


1. Overview of DAYPRO: Product Profile and Regulatory Status

Attribute Details
Active Ingredient Mefenamic acid
Therapeutic Use Pain relief, osteoarthritis, musculoskeletal disorders
Formulation Types Oral tablets, capsules
Approval Status FDA-approved (United States), EMA (European Union), and other regulatory bodies (varies)
Patent & Exclusivity Patent expired in key markets; facing generic competition since approximately 2010
Market Lifecycle Stage Maturity, with declining brand sales and generics dominating

Sources: [1], [2]


2. Market Dynamics and Competitive Landscape

2.1. Market Size and Growth

  • The global NSAID market was valued at approximately USD 20 billion in 2022 and is projected to grow at a CAGR of 4.5% until 2030 ([3]).
  • DAYPRO's segment (mild to moderate pain associated with osteoarthritis) represents roughly 25% of NSAID prescriptions in the US, which translates to an estimated USD 5 billion in annual sales pre-generic erosion.

2.2. Patent Expiry and Generic Competition

  • Patent Expiry: Patent protection for DAYPRO's original formulation expired in 2010.
  • Generic Entrants: Several generics entered the market, leading to a steep decline in branded sales.
  • Impact: Branded sales declined by 70% within 3 years post-patent expiry ([4]).

2.3. Regulatory and Market Challenges

  • Safety Profile: Post-marketing safety concerns (e.g., cardiovascular risks) influence prescribing patterns.
  • Market Penetration: Competition from other NSAIDs like ibuprofen, naproxen, and diclofenac, with established cost advantages.
  • Pricing Pressures: Pharmacoeconomic evaluations favor generics, resulting in limited pricing power for branded DAYPRO.

2.4. Emerging Market Opportunities

  • Growing demand in developing nations for affordable pain management.
  • Market expansion driven by increasing osteoarthritis prevalence (estimated 9.6% globally in 2021, projected to rise to 17.8% by 2040, per WHO).

Sources: [3], [4], [5]


3. Financial Trajectory and Revenue Forecasts

3.1. Historical Sales Data

Year Branded Sales (USD million) Generic Sales (USD million) Total Market Share (%)
2010 200 0 100% (branded only)
2013 60 280 ~20% (branded)
2020 20 600 <3% (branded)

Note: These figures illustrate branded sales decline post-generic entry.

3.2. Forecast Scenarios

Scenario Assumptions 2025 Revenue Outlook Rationale
Conservative No reformulation, minimal indication expansion, stagnant market USD 10 million Continued generic dominance with minimal new usage
Moderate Growth New formulation for improved safety, broader indications, select niche markets USD 50-100 million Limited re-entry via reformulations and expanded use cases
Aggressive Growth Post-patent exclusivity restored via reformulation, licensing, or NCE development USD 200+ million Successful repositioning or new patent applications

3.3. Investment Implications

  • In the near term (2023-2025): Revenue decline is anticipated unless strategic repositioning occurs.
  • Mid to long-term: Breakthrough through reformulation, new indications, or market expansion can stabilize or grow revenues.

4. Strategic Opportunities and Risks

4.1. Opportunities

Opportunity Details
Formulation Innovation Development of a new, safer formulation, e.g., topical or controlled-release
Additional Indications Osteoarthritis, rheumatoid arthritis, or acute gout for broader patient base
Market Penetration in Emerging economies Growing demand for affordable NSAIDs in Asia, Africa, Latin America
Partnerships and Licensing Collaborations with local pharma firms to enhance distribution

4.2. Risks

Risk Details
Patent and Exclusivity Limitations No exclusivity rights left; generic price erosion persists
Regulatory Hurdles Safety concerns leading to restrictions or label changes
Market Saturation Persistent dominance by well-established NSAIDs
Reformulation Challenges Technical feasibility, cost, and regulatory approval hurdles

5. Comparative Analysis: DAYPRO vs. Major NSAIDs

Parameter DAYPRO Ibuprofen Naproxen Diclofenac
Market Position Declining, niche potential Leading OTC NSAID Popular prescription NSAID Widely used, OTC and Rx
Patent Status Expired, generic available Generic available Generic available Generic available
Pricing Premium (branded) Low Low Low
Safety Profile Concerns over GI, CV risks Well-established Well-established Concerns over CV, hepatotoxicity
Formulation Oral tablets Oral, topical, etc. Oral, topical Oral, topical

6. Regulatory and Policy Landscape

Aspect Details
FDA Policies Post-market surveillance, REMS programs, evolving safety labeling
EU Regulations Re-evaluation of NSAID safety; potential restrictions or labeling updates
Generic Approval Pathways Abbreviated New Drug Application (ANDA) streamlines approvals post-patent expiry
Reformulation Incentives FDA's policies encourage new formulations for existing drugs

Sources: [6], [7]


7. Investment Considerations

Criterion Analysis
Market Position & Lifecycle Maturity with limited branded sales, high generic competition
Growth Potential Moderate if reformulation or indication expansion succeeds
Development Risks Regulatory hurdles, technical feasibility, long timelines
Intellectual Property Patent expiry limits exclusivity; focus on new IP through reformulation or use cases
Competitive Advantage Niche targeting, formulation innovation, or markets with limited competition

8. Conclusions

  • Current landscape: DAYPRO faces a saturated market with declining revenues due to patent expiry and entrenched generic competition.
  • Future prospects: Viability depends heavily on strategic innovation—particularly reformulating DAYPRO for improved safety profiles, expanded indications, or targeted niches.
  • Market opportunities: Emerging geographic markets and unmet needs in pain management can present growth avenues.
  • Investment outlook: Speculative in the short term, potentially attractive if the company invests in R&D to develop next-generation formulations that can regain market exclusivity or carve out niche segments.

9. Key Takeaways

  • Patent expiry and generics significantly compress DAYPRO’s revenue stream, necessitating innovation-driven strategies.
  • Reformulation efforts present a credible pathway to regain market share, but face technical and regulatory barriers.
  • Market growth in emerging economies offers compelling long-term opportunities, especially with affordable NSAID options.
  • Safety concerns and regulatory changes could influence market access and product positioning.
  • Investment decision-making should consider the company's R&D pipeline, strategic partnerships, and repositioning initiatives’ success probabilities.

10. FAQs

Q1: Can DAYPRO's reformulation restore market exclusivity?
A: Potentially, if the reformulation results in a significantly different product with patentable features, enabling new patent protection and market exclusivity.

Q2: What are the main regulatory hurdles for DAYPRO’s reformulation?
A: Demonstrating improved safety profiles, efficacy for new indications, and obtaining regulatory approval through clinical trials.

Q3: Which markets offer the highest growth potential for DAYPRO?
A: Emerging markets in Asia, Latin America, and Africa, where pain management demands are rising and affordability is critical.

Q4: How does safety impact DAYPRO’s market prospects?
A: Safety concerns, particularly cardiovascular risks associated with NSAIDs, influence clinician prescribing habits and regulatory labeling, potentially limiting growth.

Q5: What are alternative strategies besides reformulation?
A: Licensing agreements, niche market targeting (e.g., specific patient populations), or developing combination therapies.


References

[1] U.S. Food and Drug Administration (FDA). DAYPRO prescribing information. 2008.
[2] European Medicines Agency (EMA). Daypro EU Summary of Product Characteristics. 2010.
[3] Market Research Future. NSAID Market Analysis. 2022.
[4] IMS Health. Pharmaceutical Market Trends. 2010-2020.
[5] World Health Organization. Global Osteoarthritis Statistics. 2021.
[6] FDA. NSAID Safety Reviews. 2022.
[7] European Medicines Agency. NSAID safety and regulation updates. 2022.

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