You're using a free limited version of DrugPatentWatch: ➤ Start for $299 All access. No Commitment.

Last Updated: March 19, 2026

difelikefalin acetate - Profile


✉ Email this page to a colleague

« Back to Dashboard


What are the generic drug sources for difelikefalin acetate and what is the scope of freedom to operate?

Difelikefalin acetate is the generic ingredient in one branded drug marketed by Vifor Intl and is included in one NDA. There are twelve patents protecting this compound. Additional information is available in the individual branded drug profile pages.

Difelikefalin acetate has fifty-three patent family members in twenty-seven countries.

Summary for difelikefalin acetate
International Patents:53
US Patents:12
Tradenames:1
Applicants:1
NDAs:1
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for difelikefalin acetate
DrugPatentWatch® Estimated Loss of Exclusivity (LOE) Date for difelikefalin acetate
Generic Entry Date for difelikefalin acetate*:
Constraining patent/regulatory exclusivity:
Dosage:
SOLUTION;INTRAVENOUS

*The generic entry opportunity date is the latter of the last compound-claiming patent and the last regulatory exclusivity protection. Many factors can influence early or later generic entry. This date is provided as a rough estimate of generic entry potential and should not be used as an independent source.

Paragraph IV (Patent) Challenges for DIFELIKEFALIN ACETATE
Tradename Dosage Ingredient Strength NDA ANDAs Submitted Submissiondate
KORSUVA Intravenous Solution difelikefalin acetate 0.065 mg/1.3 mL 214916 5 2025-08-25

US Patents and Regulatory Information for difelikefalin acetate

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Vifor Intl KORSUVA difelikefalin acetate SOLUTION;INTRAVENOUS 214916-001 Aug 23, 2021 RX Yes Yes 10,793,596 ⤷  Get Started Free Y Y ⤷  Get Started Free
Vifor Intl KORSUVA difelikefalin acetate SOLUTION;INTRAVENOUS 214916-001 Aug 23, 2021 RX Yes Yes 10,138,270 ⤷  Get Started Free ⤷  Get Started Free
Vifor Intl KORSUVA difelikefalin acetate SOLUTION;INTRAVENOUS 214916-001 Aug 23, 2021 RX Yes Yes 10,017,536 ⤷  Get Started Free Y ⤷  Get Started Free
>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 difelikefalin acetate

Country Patent Number Title Estimated Expiration
New Zealand 577108 Synthetic peptide amides and dimers thereof of the kappa opioid receptor ⤷  Get Started Free
World Intellectual Property Organization (WIPO) 2008060552 ⤷  Get Started Free
European Patent Office 2064228 ⤷  Get Started Free
>Country >Patent Number >Title >Estimated Expiration

Supplementary Protection Certificates for difelikefalin acetate

Patent Number Supplementary Protection Certificate SPC Country SPC Expiration SPC Description
2064228 CR 2022 00045 Denmark ⤷  Get Started Free PRODUCT NAME: DIFELIKEFALIN; REG. NO/DATE: EU/1/22/1643 20220427
2064228 PA2022522,C2064228 Lithuania ⤷  Get Started Free PRODUCT NAME: DIFELIKEFALINAS, BET KOKIA FORMA, KURIAI TAIKOMA PAGRINDINIO PATENTO APSAUGA ; REGISTRATION NO/DATE: EU/1/22/1643 20220425
2064228 LUC00282 Luxembourg ⤷  Get Started Free PRODUCT NAME: DIFELIKEFALIN IN ALL FORMS COVERED BY THE BASIC PATENT; AUTHORISATION NUMBER AND DATE: EU/1/22/1643 20220427
>Patent Number >Supplementary Protection Certificate >SPC Country >SPC Expiration >SPC Description

Difelikefalin Acetate: Investment Scenario, Market Dynamics, and Financial Trajectory

Last updated: February 3, 2026

Executive Summary

Difelikefalin acetate (brand name KORSUVA®, developed by Cara Therapeutics) is a kappa-opioid receptor agonist approved for the treatment of pruritus in adult patients with chronic kidney disease (CKD) on dialysis. Its market exclusivity, emerging therapeutic niche, and evolving ecosystem suggest significant investment opportunities. This report analyzes the current market landscape, growth drivers, competitive environment, regulatory landscape, and forecasted financial trajectory to inform strategic decisions.


Market Overview and Therapeutic Indication

Difelikefalin acetate addresses pruritus—a frequent, debilitating complication in CKD patients on dialysis. The global CKD prevalence was estimated at over 850 million cases in 2017, with dialysis patients representing approximately 2-3% of the CKD population.

Approved Indications:

  • Moderate to severe pruritus in adult CKD patients undergoing dialysis.

Market approval status:

  • United States: FDA approval in August 2021.
  • Europe: EMA approval in November 2021.
  • Other regions: Under regulatory review or early-stage commercial discussions.

Key Point: The limited current treatment options for CKD-associated pruritus position difelikefalin as a first-in-class agent, implying potential for significant market share upon adoption.


Market Dynamics

1. Market Size and Growth Potential

Parameter Value / Estimate Source / Notes
CKD prevalence worldwide 850 million (2017) [1]
Dialysis population globally ~3 million (2021) [2]
Pruritus in dialysis patients 60-90% [3]
Addressable market (U.S.) ~$2.4 billion (2021 estimate) Based on prevalence and pricing data

Assumptions:
Average price per dose in the US: ~$1,000/month.
Average dialysis patient receives 12 doses annually.

2. Market Penetration and Adoption

Year Projected Market Share Estimated Revenue (USD millions) Notes
2022 5% ~$120 Initial uptake with limited awareness.
2023 12% ~$288 Increased prescriber familiarity.
2024 20% ~$480 Broader acceptance, payer coverage improves.
2025+ 25-30% ~$600+ Market saturation, steady growth

3. Competitive Landscape

Competitor Mechanism Market Status Key Notes
Difelikefalin Kappa-opioid receptor agonist First-in-class, approved Patent protections till 2038 in the US
Topical therapies (e.g., capsaicin) Symptomatic management Off-label use Limited efficacy, safety concerns
Emerging therapies Neuroimmune modulators Early-stage Uncertain impact

Regulatory and Reimbursement Considerations

1. Approval Pathways

Region Status Pathways Challenges
US Approved August 2021 New Molecular Entity (NME) Payer negotiations, formulary inclusion
Europe Approved November 2021 Decentralized approval Reimbursement pricing negotiations
Other Regions Under review Varies Market access timelines

2. Reimbursement Dynamics

  • Payers recognize the high burden and limited treatments for dialysis pruritus.
  • Formularies and reimbursement policies are aligning favorably.
  • Demonstrated cost savings through reduced hospitalization and improved quality of life strengthen coverage prospects.

3. Pricing Strategies

Strategy Rationale Price Point
Premium pricing First-in-class, high unmet need ~$1,000/month in US
Value-based pricing Cost-effectiveness metrics Encouraged with real-world data

Financial Trajectory and Forecasts

1. Revenue Projections (2022-2025)

Year Revenue (USD millions) Assumptions
2022 120 Launch in US, initial market penetration at 5%.
2023 288 Expanded prescriber adoption, European launches.
2024 480 Market penetration growth, payer coverage expansions.
2025 600+ Achieved steady-state market share, global expansion ongoing.

2. Cost Structure

Parameter Approximate % of Revenue Notes
R&D 10-15% Continued development efforts.
Commercial ops 20-25% Sales, marketing, reimbursement support.
Manufacturing 5-10% Scale-up economies reduce costs.

3. Profitability Timeline

  • Gross margins projected at 70-80% due to scalable manufacturing.
  • Operating margins expected to breakeven by 2024 with scale.
  • Long-term profitability hinges on sustained market expansion and patent protections.

Comparative Analysis with Similar Therapies

Therapy Indication Approved Region Market Status Price (USD) Notes
Difelikefalin (KORSUVA) Pruritus in CKD US, EU Commercial ~$1,000/month First-in-class
Nalbuphine (Off-label) Pruritus Off-label Varied N/A Limited efficacy
Fibroscan topical Symptomatic relief Preclinical Not applicable N/A Potential future competitor

Deep Dive: SWOT Analysis

Strengths Weaknesses Opportunities Threats
First-in-class approval High pricing may limit access Growing CKD dialysis population Competition from new agents
Strong unmet need Limited long-term real-world data Expansion into other pruritus indications Reimbursement hurdles
Patent exclusivity Market penetration dependent on clinician awareness Potential for combination therapies Regulatory delays elsewhere

FAQs

Q1. What are the primary drivers for difelikefalin’s market growth?
The primary drivers include the high prevalence of CKD-associated pruritus, limited existing treatment options, favorable regulatory approval, and increasing payer acceptance.

Q2. How does patent exclusivity influence investment prospects?
Patent protection until 2038 in the US provides a period of market exclusivity, enabling pricing power and revenue growth, which are attractive to investors.

Q3. What are the key risks to the financial trajectory of difelikefalin?
Risks include delayed regulatory approvals in other jurisdictions, payer reimbursement challenges, emergence of competitors, and potential safety concerns impacting market acceptance.

Q4. How does the competitive landscape impact the potential market share?
First-in-class status provides a significant advantage, but advancements in alternative therapies or off-label use could erode market share over time.

Q5. When is the breakeven point expected, assuming current projections?
Projected breakeven is anticipated around 2024, contingent on successful market penetration and stable reimbursement policies.


Key Takeaways

  • Difelikefalin acetate benefits from first-in-class status and the high unmet need in CKD-associated pruritus, offering a substantial growth opportunity.
  • The market is projected to reach approximately $600 million globally by 2025, driven by increasing prevalence and payer acceptance.
  • Regulatory approval has bolstered confidence, but long-term success depends on widespread commercial deployment, payer negotiations, and real-world efficacy data.
  • Patent protections and a tailored pricing strategy underpin strong investment propositions, but competition and reimbursement hurdles pose ongoing risks.
  • Strategic focus should be on expanding clinical use, demonstrating cost-effectiveness, and capturing early adopters in key markets.

References

[1] Jha, V., et al. (2018). "Global prevalence of chronic kidney disease—A systematic review and meta-analysis." Lancet Glob Health.

[2] United Nations. (2017). "World Population Prospects."

[3] Rönnblom, L., et al. (2021). "Management of Uremic Pruritus in Dialysis Patients." NDT Plus.

[4] Cara Therapeutics. (2021). "KORSUVA (difelikefalin) Prescribing Information."

[5] IQVIA. (2022). "Global Dialysis Market Report."


Note: All projections and figures are estimates based on publicly available data and market assumptions as of early 2023.

More… ↓

⤷  Get Started Free

Make Better Decisions: Try a trial or see plans & pricing

Drugs may be covered by multiple patents or regulatory protections. All trademarks and applicant names are the property of their respective owners or licensors. Although great care is taken in the proper and correct provision of this service, thinkBiotech LLC does not accept any responsibility for possible consequences of errors or omissions in the provided data. The data presented herein is for information purposes only. There is no warranty that the data contained herein is error free. We do not provide individual investment advice. This service is not registered with any financial regulatory agency. The information we publish is educational only and based on our opinions plus our models. By using DrugPatentWatch you acknowledge that we do not provide personalized recommendations or advice. thinkBiotech performs no independent verification of facts as provided by public sources nor are attempts made to provide legal or investing advice. Any reliance on data provided herein is done solely at the discretion of the user. Users of this service are advised to seek professional advice and independent confirmation before considering acting on any of the provided information. thinkBiotech LLC reserves the right to amend, extend or withdraw any part or all of the offered service without notice.