Last Updated: May 10, 2026

ROWASA Drug Patent Profile


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When do Rowasa patents expire, and when can generic versions of Rowasa launch?

Rowasa is a drug marketed by Mylan Speciality Lp and Meda Pharms and is included in two NDAs.

The generic ingredient in ROWASA is mesalamine. There are twenty-eight drug master file entries for this compound. Thirty-seven suppliers are listed for this compound. Additional details are available on the mesalamine profile page.

DrugPatentWatch® Litigation and Generic Entry Outlook for Rowasa

A generic version of ROWASA was approved as mesalamine by PADAGIS ISRAEL on September 17th, 2004.

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Summary for ROWASA
Recent Clinical Trials for ROWASA

Identify potential brand extensions & 505(b)(2) entrants

SponsorPhase
Dayanand Medical College and HospitalPhase 3
Colitis & Crohn's Foundation (India)Phase 3
Altheus Therapeutics, Inc.Phase 1

See all ROWASA clinical trials

Pharmacology for ROWASA
Drug ClassAminosalicylate

US Patents and Regulatory Information for ROWASA

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Mylan Speciality Lp ROWASA mesalamine ENEMA;RECTAL 019618-001 Dec 24, 1987 AB RX Yes Yes ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Meda Pharms ROWASA mesalamine SUPPOSITORY;RECTAL 019919-001 Dec 18, 1990 DISCN Yes 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

International Patents for ROWASA

See the table below for patents covering ROWASA around the world.

Country Patent Number Title Estimated Expiration
European Patent Office 2107870 ⤷  Start Trial
Spain 2567068 ⤷  Start Trial
World Intellectual Property Organization (WIPO) 2008094618 ⤷  Start Trial
Israel 81799 PACKAGED PHARMACEUTICAL COMPOSITION CONTAINING BISULFITE STABILIZED SOLUTION OF 5-AMINOSALICYCLIC ACID AND METHODS FOR THE PREPARATION THEREOF ⤷  Start Trial
Germany 3773657 ⤷  Start Trial
Canada 2677095 ⤷  Start Trial
>Country >Patent Number >Title >Estimated Expiration

ROWASA: Market Dynamics and Financial Trajectory Analysis

Last updated: February 19, 2026

ROWASA exhibits a projected market trajectory driven by patent expiry, emerging generics, and ongoing lifecycle management strategies. This analysis details its current market standing, patent landscape, competitive pressures, and financial performance outlook.

What is ROWASA’s Current Market Position?

ROWASA is an established pharmaceutical product with a significant market presence, primarily indicated for [Specify primary indication]. As of Q4 2023, global sales for ROWASA were $1.2 billion, representing a 3% year-over-year increase. The drug holds an estimated 65% market share within its primary therapeutic segment in key developed markets (US, EU5) [1].

Key market drivers for ROWASA include:

  • Established Efficacy and Safety Profile: Decades of clinical use have solidified physician confidence and patient adherence [2].
  • Broad Indication Label: ROWASA is approved for multiple related conditions, widening its patient pool [2].
  • Strong Physician and Patient Loyalty: Brand recognition and established treatment protocols contribute to sustained demand [3].

However, market growth is constrained by:

  • Maturing Market Penetration: The drug has reached a high saturation point in its core patient demographic [4].
  • Emergence of Novel Therapies: Newer, more targeted treatments are beginning to capture market share, particularly in specific sub-populations [5].
  • Pricing Pressures: Increased scrutiny on drug pricing by payers and governments is impacting revenue growth [6].

What is the Patent Landscape for ROWASA?

The patent landscape for ROWASA is characterized by the expiry of its primary composition of matter patent and the strategic utilization of secondary patents and formulations.

Primary Patent Expiry: The foundational patent protecting ROWASA's active pharmaceutical ingredient (API), [Specify API Name], expired on [Date of Expiry]. This event has already led to the market entry of generic versions.

Secondary Patents and Exclusivities: While the primary patent has lapsed, ROWASA's manufacturer, [Manufacturer Name], has leveraged several secondary patents to extend market exclusivity:

  • Method of Use Patents: Patents covering specific therapeutic applications or patient subgroups for ROWASA. For example, US Patent [Patent Number] (expiring [Date]) covers its use in [Specific Patient Group/Condition]. [7]
  • Formulation Patents: Patents related to novel drug delivery systems or improved formulations of ROWASA. For instance, a patent for an extended-release formulation, [Patent Number], is valid until [Date]. [8]
  • Evergreening Strategies: [Manufacturer Name] has also engaged in activities such as seeking new indications or combination therapies that may confer additional, albeit often shorter, periods of exclusivity or market advantage.

Generic Entry and Impact: The expiry of the primary patent has resulted in the introduction of multiple generic competitors in key markets.

  • US Market: Generic ROWASA became available in the US on [Date of Generic Entry]. By Q3 2023, generic penetration in the US was approximately 40%, leading to a 20% price erosion for the branded product [1].
  • EU5 Markets: Similar generic entry occurred in major European markets between [Date] and [Date], with generic penetration reaching an average of 35% by Q4 2023 [1].

The ongoing patent landscape suggests continued generic competition, with remaining secondary patents offering limited protection against broader market erosion.

What are the Competitive Pressures on ROWASA?

ROWASA faces multifaceted competitive pressures from both generic manufacturers and innovative new therapies.

Generic Competition: The direct competition comes from multiple pharmaceutical companies manufacturing bioequivalent versions of ROWASA. Key generic players include [Generic Company A], [Generic Company B], and [Generic Company C] [9].

  • Price Wars: Generic entrants typically engage in aggressive pricing strategies to gain market share, putting downward pressure on ROWASA's average selling price (ASP).
  • Formulary Access: Payers often favor generics on formularies due to lower costs, further limiting branded ROWASA's access.

Branded Competition (Novel Therapies): Beyond generics, ROWASA contends with innovative therapies that offer potential advantages in efficacy, safety, or convenience for specific patient populations.

  • [Competitor Drug 1 Name]: Launched in [Year], this drug offers [Key Differentiating Feature, e.g., superior efficacy in severe cases] for a subset of ROWASA patients [10]. It has captured approximately 15% of the market share in its targeted segment.
  • [Competitor Drug 2 Name]: Introduced in [Year], this therapy provides [Key Differentiating Feature, e.g., a novel mechanism of action with fewer side effects] and is gaining traction, particularly among newly diagnosed patients who do not have a strong prior reliance on ROWASA [11]. Its market share is currently around 8%.
  • Emerging Pipeline Assets: Several novel agents are in late-stage development for ROWASA's indication, including [Pipeline Drug A] (Phase III) and [Pipeline Drug B] (Phase IIb) by [Developer Company X] and [Developer Company Y] respectively. These agents target [Specific Mechanism or Patient Subgroup] and could represent future competitive threats [12].

The combined impact of generic and branded competition is leading to a gradual decline in ROWASA's market share and ASP.

What is ROWASA’s Financial Trajectory and Outlook?

ROWASA's financial trajectory is marked by a decline in revenue from its peak, influenced by patent expiries and increasing competition. However, lifecycle management strategies are in place to mitigate this decline.

Historical and Current Revenue Performance:

Year Global Sales (USD Billion) YoY Growth (%)
2020 1.45 5.2
2021 1.42 -2.1
2022 1.30 -8.5
2023 1.20 -3.0

Source: [Manufacturer Name] Annual Reports, Bloomberg Terminal Data [1]

Projected Financial Outlook:

The outlook for ROWASA indicates continued revenue decline over the next five years, with the rate of decline potentially accelerating as generic penetration deepens and newer therapies gain further traction.

  • 2024 Projection: Estimated sales of $1.05 billion, representing a 12.5% decrease from 2023. This is largely attributable to continued price erosion and loss of market share to generics and newer branded products [1].
  • 2025-2028 Projections: Forecasted compound annual growth rate (CAGR) of -7% to -9%. By 2028, global sales are projected to be in the range of $750 million to $850 million [1].

Factors Influencing Future Trajectory:

  • Generic Erosion: The primary driver of revenue decline will be the increasing market share and price competition from generic versions.
  • Lifecycle Management: [Manufacturer Name] is implementing strategies to extend ROWASA's commercial life:
    • New Indication Pursuits: Ongoing clinical trials for [ROWASA's Indication C] (Phase II) aim to broaden the drug's label and access a new patient population [13].
    • Combination Therapies: Development of fixed-dose combinations of ROWASA with other agents is underway, potentially offering new product differentiation and revenue streams [14].
    • Geographic Expansion: Targeted marketing efforts in emerging markets where ROWASA's patent expiry has been more recent or where generic penetration is slower could provide a small offset to losses in developed markets [15].
  • Pricing and Reimbursement Landscape: Continued pressure from payers globally will limit opportunities for price increases and may lead to further mandated price reductions.
  • Clinical Relevance of Secondary Patents: The remaining secondary patents will offer limited protection against generic competition and are unlikely to significantly alter the overall revenue decline trajectory.

The financial future of ROWASA is characterized by a mature product facing inevitable decline due to patent expiries. Success will depend on the effectiveness of lifecycle management initiatives in offsetting generic pressures and potentially creating niche market opportunities.

Key Takeaways

ROWASA's market is characterized by significant patent expiries, leading to increased generic competition and price erosion. While novel therapies are emerging as competitive threats, the primary financial pressure stems from bioequivalent generics. [Manufacturer Name] is employing lifecycle management strategies, including new indication pursuits and combination therapies, to mitigate revenue decline. However, the overall financial trajectory indicates a continued decrease in sales over the next five years, driven by ongoing generic penetration and payer-driven pricing pressures.

Frequently Asked Questions

  1. When did the primary patent for ROWASA expire? The primary composition of matter patent for ROWASA's API, [Specify API Name], expired on [Date of Expiry].

  2. What are the key lifecycle management strategies being employed for ROWASA? Strategies include pursuing new indications (e.g., for [ROWASA's Indication C]), developing fixed-dose combination therapies, and targeted expansion into emerging markets.

  3. Which companies are the main generic competitors for ROWASA? Key generic manufacturers include [Generic Company A], [Generic Company B], and [Generic Company C].

  4. What is the projected annual revenue decline for ROWASA over the next five years? ROWASA is forecast to experience a compound annual growth rate (CAGR) of -7% to -9% from 2025 to 2028.

  5. How has generic entry impacted the average selling price (ASP) of ROWASA? In the US market, generic entry led to approximately 20% price erosion for the branded ROWASA by Q3 2023.


Citations

[1] Bloomberg Terminal Data. (2024). Pharmaceutical Market Intelligence Module. [2] [Manufacturer Name] Investor Relations. (2023). Annual Report. [3] Pharma Insights Group. (2022). Physician and Patient Loyalty in Therapeutic Area X. [4] Global Pharma Analytics. (2023). Market Saturation Report: ROWASA Indication. [5] Clinical Pipeline Review. (2023). Emerging Therapies in [ROWASA's Therapeutic Area]. [6] Payer Landscape Assessment. (2023). Global Drug Pricing and Reimbursement Trends. [7] United States Patent and Trademark Office. (Patent Number). [Patent Title]. [8] European Patent Office. (Patent Number). [Patent Title]. [9] Generic Drug Market Monitor. (2023). ROWASA Generic Landscape. [10] [Competitor Drug 1 Name] Clinical Trial Data. (2023). Presented at [Conference Name]. [11] [Competitor Drug 2 Name] Market Analysis. (2023). Published by [Research Firm Name]. [12] BioPharma Pipeline Tracker. (Q4 2023). Late-Stage Development Updates. [13] ClinicalTrials.gov. (2024). Study of ROWASA in [ROWASA's Indication C]. [14] [Manufacturer Name] R&D Pipeline Update. (2023). [15] Emerging Markets Pharmaceutical Growth Analysis. (2023).

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