difelikefalin acetate - Profile

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

Constraining patent/regulatory exclusivity:

NEW CHEMICAL ENTITY

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			Y	Y
Vifor Intl	KORSUVA	difelikefalin acetate	SOLUTION;INTRAVENOUS	214916-001	Aug 23, 2021		RX	Yes	Yes
Vifor Intl	KORSUVA	difelikefalin acetate	SOLUTION;INTRAVENOUS	214916-001	Aug 23, 2021		RX	Yes	Yes				Y
Vifor Intl	KORSUVA	difelikefalin acetate	SOLUTION;INTRAVENOUS	214916-001	Aug 23, 2021		RX	Yes	Yes
Vifor Intl	KORSUVA	difelikefalin acetate	SOLUTION;INTRAVENOUS	214916-001	Aug 23, 2021		RX	Yes	Yes
Vifor Intl	KORSUVA	difelikefalin acetate	SOLUTION;INTRAVENOUS	214916-001	Aug 23, 2021		RX	Yes	Yes			Y	Y
Vifor Intl	KORSUVA	difelikefalin acetate	SOLUTION;INTRAVENOUS	214916-001	Aug 23, 2021		RX	Yes	Yes

International Patents for difelikefalin acetate

Country	Patent Number	Title	Estimated Expiration
Portugal	2064228
South Korea	20090085097
South Korea	101513737
Netherlands	301199
Australia	2007319831
South Africa	200903053	SYNTHETIC PEPTIDE AMIDES AND DIMERS THEREOF
Cyprus	2022032

Supplementary Protection Certificates for difelikefalin acetate

Patent Number	Supplementary Protection Certificate	SPC Country	SPC Expiration	SPC Description
2064228	PA2022522	Lithuania		PRODUCT NAME: DIFELIKEFALINAS, BET KOKIA FORMA, KURIAI TAIKOMA PAGRINDINIO PATENTO APSAUGA ; REGISTRATION NO/DATE: EU/1/22/1643 20220425
2064228	PA2022522,C2064228	Lithuania		PRODUCT NAME: DIFELIKEFALINAS, BET KOKIA FORMA, KURIAI TAIKOMA PAGRINDINIO PATENTO APSAUGA ; REGISTRATION NO/DATE: EU/1/22/1643 20220425
2064228	C202230052	Spain		PRODUCT NAME: DIFELICEFALINA, OPCIONALMENTE EN FORMA DE UNA SAL FARMACEUTICAMENTE ACEPTABLE,HIDRATO, SOLVATO, HIDRATO DE SAL DE ACIDO O N-OXIDO; NATIONAL AUTHORISATION NUMBER: EU/1/22/1643; DATE OF AUTHORISATION: 20220425; NUMBER OF FIRST AUTHORISATION IN EUROPEAN ECONOMIC AREA (EEA): EU/1/22/1643; DATE OF FIRST AUTHORISATION IN EEA: 20220425
2064228	CA 2022 00045	Denmark		PRODUCT NAME: DIFELIKEFALIN IN ALL FORMS COVERED BY THE BASIC PATENT; REG. NO/DATE: EU/1/22/1643 20220427
2064228	SPC/GB22/048	United Kingdom		PRODUCT NAME: DIFELIKEFALIN, OPTIONALLY IN THE FORM OF A PHARMACEUTICALLY ACCEPTABLE SALT, HYDRATE, SOLVATE, ACID-SALT-HYDRATE OR N-OXIDE; REGISTERED: UK EU/1/22/1643(FOR NI) 20220427; UK MORE ON HISTORY TAB 20220427
2064228	CR 2022 00045	Denmark		PRODUCT NAME: DIFELIKEFALIN; REG. NO/DATE: EU/1/22/1643 20220427
2064228	122022000071	Germany		PRODUCT NAME: DIFELIKEFALIN IN ALLEN DURCH DAS GRUNDPATENT GESCHUETZTEN FORMEN; REGISTRATION NO/DATE: EU/1/22/1643 20220425

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.

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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.

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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

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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

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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.

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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

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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.

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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.

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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."

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