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Last Updated: March 23, 2025

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United Kingdom: These 3 Drugs Face Patent Expirations and Generic Entry From 2025 - 2026

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Preferred citation:
Friedman, Yali, "United Kingdom: These 3 Drugs Face Patent Expirations and Generic Entry From 2025 - 2026" DrugPatentWatch.com thinkBiotech, 2025 www.drugpatentwatch.com/p/expiring-drug-patents-generic-entry/.
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These estimated drug patent expiration dates and generic entry opportunity dates are calculated from analysis of known patents covering drugs. Many factors can influence early or late generic entry. This information is provided as a rough estimate of generic entry potential and should not be used as an independent source. The methodology is described in this blog post.
When can APTIOM (eslicarbazepine acetate) generic drug versions launch?

Generic name: eslicarbazepine acetate
DrugPatentWatch® Estimated Key Patent Expiration / Generic Entry Date: July 29, 2025
Generic Entry Controlled by: United Kingdom Patent 515,690

Drug Price Trends for APTIOM
APTIOM is a drug marketed by Sumitomo Pharma Am. There are eleven patents protecting this drug and one Paragraph IV challenge. One tentatively approved generic is ready to enter the market.

This drug has one hundred patent family members in twenty-six countries. There has been litigation on patents covering APTIOM

See drug price trends for APTIOM.

The generic ingredient in APTIOM is eslicarbazepine acetate. There are twelve drug master file entries for this API. Two suppliers are listed for this generic product. Additional details are available on the eslicarbazepine acetate profile page.

When can PICATO (ingenol mebutate) generic drug versions launch?

Generic name: ingenol mebutate
DrugPatentWatch® Estimated Key Patent Expiration / Generic Entry Date: December 16, 2025
Generic Entry Controlled by: United Kingdom Patent 525,680

Drug Price Trends for PICATO
PICATO is a drug marketed by Leo Labs. There are twelve patents protecting this drug and one Paragraph IV challenge. One tentatively approved generic is ready to enter the market.

This drug has thirty-five patent family members in twenty-one countries. There has been litigation on patents covering PICATO

See drug price trends for PICATO.

The generic ingredient in PICATO is ingenol mebutate. There are three drug master file entries for this API. Additional details are available on the ingenol mebutate profile page.

When can MACRILEN (macimorelin acetate) generic drug versions launch?

Generic name: macimorelin acetate
DrugPatentWatch® Estimated Key Patent Expiration / Generic Entry Date: February 18, 2026
Generic Entry Controlled by: United Kingdom Patent 603,295

MACRILEN is a drug marketed by Novo. There is one patent protecting this drug.

This drug has eleven patent family members in ten countries.

See drug price trends for MACRILEN.

The generic ingredient in MACRILEN is macimorelin acetate. One supplier is listed for this generic product. Additional details are available on the macimorelin acetate profile page.

Market Analysis and Financial Projection

The United Kingdom's pharmaceutical market is characterized by a mature generics sector and a dynamic branded drugs environment, facing evolving regulatory pressures post-Brexit and significant pricing reforms. Below is a structured assessment of the market dynamics, regulatory challenges, and emerging opportunities.

Market Overview: Branded vs. Generic Medicines

The UK generics market accounted for $15.4 billion in 2022, with a compound annual growth rate (CAGR) of 6.8% since 2017, driven by NHS cost-containment policies[2][8]. Generic penetration is high, representing 75% of total prescriptions but only 28% of NHS drug spending at reimbursement prices, reflecting their role in reducing costs[1][6]. Branded medicines, while representing a smaller share of prescriptions, dominate spending due to higher prices and innovation premiums. However, price reductions averaging 89% occur post-patent expiry as generics enter the market[6].

Supply chain vulnerabilities have emerged recently, with generic medicine shortages contributing to an 8.2% price increase in 2022[2]. The market also faces competition from emerging economies, leading major manufacturers like AstraZeneca to shift production abroad[5].


Regulatory Challenges

1. Post-Brexit Fragmentation

The MHRA now independently regulates UK medicines post-Brexit, requiring duplicate submissions for Great Britain (GB) and Northern Ireland (NI) under initial terms. While the 2025 Windsor Framework streamlines approvals under a UK-wide MHRA license, initial transitions caused delays and administrative burdens[3][17]. The loss of EMA collaboration risks slower access to pan-European clinical trial data and approvals[4][15].

2. Pricing Pressures and Rebate Schemes

  • Statutory Scheme: Payment rates for newer branded medicines will rise to 32.2% of NHS sales in late 2025, up from 15.5%, far exceeding rates in Germany (7%) and France (5.7%)[7][9].
  • Voluntary Scheme (VPAG): The 2025 payment rate is 22.9%, requiring £3.4 billion in rebates, straining companies’ financial planning[11].
  • Impact on Generics: Branded generics, which comprise 90% of low-cost alternatives to originators, face margin erosion under these schemes, risking market exit and reduced competition[18].

3. Patent Clustering and Competition Barriers

Originator companies often file 1,300+ patents per molecule to delay generic entry, creating legal uncertainties—particularly for smaller manufacturers[6]. This practice limits price declines post-patent expiry, countering NHS cost-saving goals.

4. MHRA Capacity Constraints

The MHRA’s expanded role post-Brexit has strained resources, slowing approval timelines for generics despite recent improvements in initial assessments[6][12].


Regulatory Opportunities

1. Accelerated Approvals and International Collaboration

The MHRA’s Innovative Licensing and Access Pathway (ILAP) and recognition of approvals from seven reference countries (e.g., EMA, FDA) aim to cut drug launch timelines by 25%[10][13]. This could enhance the UK’s appeal for global trials and early-access programs.

2. Digital Transformation

Adoption of AI and data analytics in manufacturing and trials is projected to reduce drug development costs by 20–30%, addressing inefficiencies in the £2.6 billion basic pharmaceuticals sector[5][15].

3. Windsor Framework Stabilization

The 2025 UK-wide licensing regime eliminates dual GB/NI approvals, simplifying market entry and ensuring simultaneous medicine access across all UK regions[17].

4. Flexible Pricing Models

The VPAG’s five-year term and £380 million baseline adjustment by 2027 aim to balance NHS affordability with industry growth incentives, though high rebates remain contentious[9][13].


Strategic Considerations for Market Players

  • Generics Manufacturers: Advocate for MHRA efficiency in approvals and oppose patent clustering. diversify portfolios to include biosimilars[6][18].
  • Branded Drug Companies: Leverage MHRA’s accelerated pathways for niche therapies while engaging policymakers on sustainable rebate caps[13][15].
  • Regulators: Address MHRA resourcing gaps and align with international standards to avoid duplication[4][12].

“The UK’s generic market is a global leader in cost efficiency, but unsustainable pricing policies risk undermining its success.”
— Oxera Consulting, 2019[1]

This evolving landscape demands balanced policies to sustain innovation while ensuring affordable access—a challenge intensified by Brexit and NHS budgetary pressures.

References

  1. https://www.oxera.com/wp-content/uploads/2019/06/Oxera-study-on-the-supply-of-generic-medicines-in-the-UK-26-June-2019.pdf
  2. https://www.researchandmarkets.com/report/united-kingdom-generics-market
  3. https://www.pharmalex.com/thought-leadership/blogs/brexit-impact-challenges-and-solutions-for-the-pharmaceutical-industry/
  4. https://pharmaceutical-journal.com/article/opinion/drug-regulation-in-the-uk-risks-and-opportunities-post-brexit
  5. https://www.ibisworld.com/united-kingdom/industry/basic-pharmaceutical-product-manufacturing/1160/
  6. https://www.britishgenerics.co.uk/key-issues.html
  7. https://www.abpi.org.uk/media/news/2025/march/uk-set-to-demand-a-third-of-pharmaceutical-company-revenue-in-second-half-of-2025/
  8. https://gabionline.net/country-focus/united-kingdom
  9. https://www.gov.uk/government/consultations/proposed-review-of-the-statutory-scheme-for-branded-medicines-pricing/proposed-review-of-the-2025-scheme-to-control-the-cost-of-branded-health-service-medicines
  10. https://www.pharmaceutical-technology.com/features/a-sense-of-urgency-swirls-in-the-uk-pharma-regulatory-landscape/
  11. https://www.abpi.org.uk/media/news/2025/january/abpi-comment-on-2025-vpag-rates-of-229/
  12. https://www.adalovelaceinstitute.org/resource/pharmaceutical-regulation-uk/
  13. https://trinitylifesciences.com/blog/rise-with-the-waves-uk-four-policy-trends-that-may-shape-pharmas-future/
  14. https://www.insideeulifesciences.com/2023/06/01/update-on-the-vpas-judicial-review-brought-by-the-british-generic-manufacturers-association/
  15. https://bpspubs.onlinelibrary.wiley.com/doi/am-pdf/10.1111/bcp.13077
  16. https://books.seedstm.com/index.php/seed/catalog/download/Pharmaceutical_MA_developed/PDF/747.ch3?inline=1
  17. https://www.arnoldporter.com/en/perspectives/advisories/2025/01/new-year-new-uk-wide-licensing-regime
  18. https://www.wavedata.co.uk/branded-generics-vpas-and-the-future-of-the-generics-industry/

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