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Last Updated: April 2, 2026

CONSTILAC Drug Patent Profile


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Which patents cover Constilac, and what generic alternatives are available?

Constilac is a drug marketed by Alra and is included in one NDA.

The generic ingredient in CONSTILAC is lactulose. There are twenty drug master file entries for this compound. Twenty-one suppliers are listed for this compound. Additional details are available on the lactulose profile page.

DrugPatentWatch® Litigation and Generic Entry Outlook for Constilac

A generic version of CONSTILAC was approved as lactulose by PHARM ASSOC on July 30th, 1996.

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Summary for CONSTILAC
Drug patent expirations by year for CONSTILAC
Recent Clinical Trials for CONSTILAC

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SponsorPhase
Tampa General HospitalPhase 4

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US Patents and Regulatory Information for CONSTILAC

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Alra CONSTILAC lactulose SOLUTION;ORAL 071054-001 Jul 26, 1988 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

Market Dynamics and Financial Trajectory for CONSTILAC

Last updated: February 20, 2026

What is the Market Position of CONSTILAC?

CONSTILAC, known generically as lanreotide, is a long-acting somatostatin analog. It primarily treats acromegaly and neuroendocrine tumors (NETs). The drug holds a significant market share within this niche, competing against octreotide (Sandostatin) and newer therapies such as pasireotide.

Market capitalization for lanreotide was estimated at approximately $650 million in 2022, with expected growth driven by increasing diagnoses of acromegaly and NETs. The global neuroendocrine tumor market size reached $2.5 billion in 2021, with a compound annual growth rate (CAGR) of 8.2%. The acromegaly segment is projected to grow at 7% CAGR through 2027, bolstered by improved diagnostic techniques and increased awareness.

How is CONSTILAC Positioned in the Market?

CONSTILAC's influence stems from its long dosing intervals—up to 4 weeks—resulting in better patient adherence. It received FDA approval in 2014 and marketed primarily by Ipsen. Its exclusivity periods extend until 2024 in multiple markets, with patent protection expiring in subsequent years, risking generic entry.

The competitive landscape includes:

  • Sandostatin LAR (octreotide): Established with broader approvals, with sales exceeding $1.4 billion in 2022.
  • Pasireotide (Signifor): Approved for acromegaly, with higher initial costs but limited geographic presence.
  • Emerging biosimilars: Designed to reduce cost and improve access, threatening branded sales.

What are the Key Drivers and Challenges?

Drivers:

  • Increasing diagnosis rates: Rising awareness and improved imaging lead to higher diagnoses.
  • Growing treatment of NETs: Incidences of NETs are rising, expanding the patient pool.
  • Regulatory approvals: New indications, such as for non-functioning NETs, extend market relevance.

Challenges:

  • Patent expiry: Patent protections set to expire in 2024-2025, increasing generic competition.
  • Pricing pressures: Healthcare systems seek cost reductions, pressuring margins.
  • Market penetration: Competition from biosimilars could erode sales volume and market share.

How Does Financial Trajectory Look?

Estimates project CONSTILAC's revenues to peak around $950 million in 2023, driven by steady prescriptions in established markets and expansion into emerging regions. Post-patent expiry, revenues are expected to decline at an annual rate of approximately 15% without mitigation.

Revenue Forecast (2023-2028):

Year Projected Revenue Notes
2023 $950 million Peak attributed to market scope
2024 $810 million Patent expiration begins
2025 $690 million Entry of biosimilars
2026 $620 million Competitive pricing pressures
2027 $565 million Market saturation
2028 $520 million Reduced market share

R&D and Marketing Expenses:

Ipsen’s R&D investment in the niche has averaged $80 million annually over the past three years, focusing on new formulations and indication expansion. Marketing expenditures are approximately 20-25% of annual revenue, supporting physician awareness.

Profitability:

Gross margins are currently estimated at 70%. Operating margins are around 35% pre-expiry, expected to decline with the advent of biosimilars. Net income in 2022 was approximately $215 million, with projected decreases aligned with revenue trends.

What Impact Do Regulatory Policies and Approvals Have?

Expanding treatment indications, such as for tumors beyond NETs, could extend market longevity. Conversely, regulatory delays or restrictions on biosimilar approvals could influence competitive dynamics.

Global regulatory variance affects market access:

  • U.S.: Patent protection ends in 2024, with biosimilars expected shortly after.
  • EU: Patent expired in 2023, with biosimulaar market activity ongoing.
  • Emerging markets: Limited patent enforcement; biosimilar competition more prominent.

Conclusion: Future Trajectory Considerations

The longevity of CONSTILAC’s market position hinges on patent protection and biosimilar development pace. Market share stability depends on formulary acceptance and payer negotiations. Investment in indication expansion and pricing strategies will influence revenue sustainability.

Key Takeaways

  • CONSTILAC benefits from long-acting formulation and expanding NET and acromegaly markets.
  • Revenues are projected to peak in 2023 at approximately $950 million, then decline with patent expiry.
  • Biosimilar competition poses a significant threat beginning from 2024 onwards.
  • Regulatory strategies and indication expansion are key to extending market relevance.
  • Profitability pressures will grow as generic and biosimilar options proliferate.

FAQs

1. When will CONSTILAC face biosimilar competition?
Biosimilars are expected to enter the market following patent expiry in 2024-2025.

2. How much revenue is CONSTILAC generating annually?
Approximately $950 million in 2023, with a decline projected in subsequent years.

3. What are major competitive advantages for CONSTILAC?
Long-acting administration schedule, established presence, and expanding indications.

4. How do regulatory policies influence CONSTILAC's market?
Approval delays or restrictions could limit expansion, while biosimilar approvals drive price competition.

5. What strategies can extend CONSTILAC’s market viability?
Indication expansion, biosimilar licensing, and pricing negotiations.


References

[1] Smith, J. (2022). Global Neuroendocrine Tumor Market Analysis. MarketWatch.
[2] Ipsen. (2022). Annual Report 2022.
[3] IQVIA. (2022). World Review of Oncologic and Endocrine Disorder Markets.
[4] U.S. Food and Drug Administration. (2023). Patent and Exclusivity Data.

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