rezafungin acetate - Profile

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

Rezafungin acetate is the generic ingredient in one branded drug marketed by Mundipharma and is included in one NDA. There are seven patents protecting this compound. Additional information is available in the individual branded drug profile pages.

Rezafungin acetate has one hundred and four patent family members in twenty-seven countries.

Summary for rezafungin acetate

International Patents:	104
US Patents:	7
Tradenames:	1
Applicants:	1
NDAs:	1

DrugPatentWatch^® Estimated Loss of Exclusivity (LOE) Date for rezafungin acetate

Constraining patent/regulatory exclusivity:

GENERATING ANTIBIOTIC INCENTIVES NOW

Dosage:

POWDER;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.

US Patents and Regulatory Information for rezafungin acetate

Applicant	Tradename	Generic Name	Dosage	NDA	Approval Date	TE	Type	RLD	RS	Patent No.	Patent Expiration	Product	Substance	Delist Req.	Exclusivity Expiration
Mundipharma	REZZAYO	rezafungin acetate	POWDER;INTRAVENOUS	217417-001	Mar 22, 2023		RX	Yes	Yes			Y	Y
Mundipharma	REZZAYO	rezafungin acetate	POWDER;INTRAVENOUS	217417-001	Mar 22, 2023		RX	Yes	Yes			Y	Y
Mundipharma	REZZAYO	rezafungin acetate	POWDER;INTRAVENOUS	217417-001	Mar 22, 2023		RX	Yes	Yes			Y	Y
Mundipharma	REZZAYO	rezafungin acetate	POWDER;INTRAVENOUS	217417-001	Mar 22, 2023		RX	Yes	Yes			Y	Y
Mundipharma	REZZAYO	rezafungin acetate	POWDER;INTRAVENOUS	217417-001	Mar 22, 2023		RX	Yes	Yes			Y	Y

International Patents for rezafungin acetate

Country	Patent Number	Title	Estimated Expiration
Australia	2019201072	Dosing regimens for echinocandin class compounds
Israel	274829	תכשיר פרמצבטי המכיל תרכובת אצ'ינוקנדין ושימוש בתכשיר מיובש בהקפאה המכיל תרכובת אצ'ינוקנדין בהכנת תמיסה מימית לטיפול בזיהום פטריתי (A pharmaceutical composition comprising an echinocandin compound and use of a lyophilized composition comprising an echinocandin compound in the preparation of an aqueous solution for treating a fungal infection)
World Intellectual Property Organization (WIPO)	2013142279
South Korea	20140138976
Croatia	P20200072

Supplementary Protection Certificates for rezafungin acetate

Patent Number	Supplementary Protection Certificate	SPC Country	SPC Expiration	SPC Description
2680873	2490021-9	Sweden		PRODUCT NAME: REZAFUNGIN OR A PHARMACEUTICALLY ACCEPTABLE SALT THEREOF, IN PARTICULAR REZAFUNGIN ACETATE; REG. NO/DATE: EU/1/23/1775 20231222
2680873	301280	Netherlands		PRODUCT NAME: REZAFUNGIN OF EEN FARMACEUTISCH AANVAARDBAAR ZOUT DAARVAN, IN HET BIJZONDER REZAFUNGINACETAAT; REGISTRATION NO/DATE: EU/1/23/1775 20231222
2680873	2024C/527	Belgium		PRODUCT NAME: REZAFUNGINE OF EEN FARMACEUTISCH AANVAARDBAAR ZOUT DAARVAN, IN HET BIJZONDER REZAFUNGINEACETAAT; AUTHORISATION NUMBER AND DATE: EU/1/23/1775 20231222
2680873	C202430028	Spain		PRODUCT NAME: REZAFUNGINA O UNA SAL FARMACEUTICAMENTE ACEPTABLE DE LA MISMA, EN PARTICULAR ACETATO DE REZAFUNGINA; NATIONAL AUTHORISATION NUMBER: EU/1/23/1775; DATE OF AUTHORISATION: 20231222; NUMBER OF FIRST AUTHORISATION IN EUROPEAN ECONOMIC AREA (EEA): EU/1/23/1775; DATE OF FIRST AUTHORISATION IN EEA: 20231222
2680873	C20240022	Finland		PRODUCT NAME: RESAFUNGIIN;REG NO/DATE: EU/1/23/1775 22.12.2023

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

Last updated: February 3, 2026

Executive Summary

Rezafungin acetate emerges as an innovative antifungal agent in the clinical development pipeline, targeting invasive fungal infections with a novel once-weekly intravenous dosing profile. This comprehensive analysis evaluates its current market positioning, competitive landscape, regulatory status, potential revenue streams, and investment viability. The key takeaway: Rezafungin's unique pharmacokinetics and broad-spectrum activity position it as a promising candidate in antifungal therapeutics, with significant commercial potential contingent on clinical outcomes and regulatory approval.

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What is Rezafungin Acetate?

Rezafungin, also known as CD101, is a novel echinocandin antifungal developed by Cidara Therapeutics. Its distinct structure provides:

• Extended half-life (~130 hours), enabling once-weekly dosing.
• Broad-spectrum antifungal activity against Candida spp., Aspergillus spp., and other fungi.
• Enhanced stability and reduced toxicity, potentially improving patient adherence and reducing adverse events.

Current development phases are focused on invasive candidiasis and other systemic fungal infections, which represent high-risk markets.

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Market Overview

Global Antifungal Market Size and Growth Forecast

Metric	2022	2027 (Forecast)	CAGR	Source
Market Size	$14.6 billion	$20.9 billion	7.4%	[1]
Main Drivers	Rising immunocompromised population, increasing invasive fungal infections	Same as above

Key Market Segments

Segment	Estimated Market Share (2022)	Growth Drivers	Challenges
Invasive candidiasis	~$4B	Rising immunosuppression, transplantations	Diagnostic delays
Aspergillosis	~$3B	Increased antifungal resistance	Limited oral options
Pediatric and other systemic fungal infections	~$2B	Growing disease awareness	Regulatory hurdles

Competitive Landscape

Competitor	Major Drugs	Market Share	Limitations	Development Status
Caspofungin	Cancidas (MSD)	~30%	IV only, resistance	Approved
Micafungin	Mycamine (Astellas)	~15%	Limited spectrum	Approved
Isavuconazole	Cresemba (Basilea)	~10%	Oral bioavailability	Approved
Rezafungin	CD101	N/A	Clinical trials	Phase 3 in progress

Key Differentiators of Rezafungin

• Once-weekly dosing improves patient compliance over daily regimens.
• Reduced toxicity profile compared to existing agents.
• Potential for prophylactic use in high-risk settings like ICUs.

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Clinical Development and Regulatory Status

Phase	Program	Indication	Data Milestones	Regulatory Status	Timeline (Projected)
Phase 3	ReSTORE (Invasive Candidiasis)	Invasive candidiasis	Top-line data expected 2023	Submit NDA in 2024	NDA submission Q3 2024¹
Phase 2	Prophylaxis in HSCT	Fungal infection prevention	Positive interim results 2022	N/A	Regulatory submission 2024
Phase 1	Safety and tolerability	Healthy volunteers	Completed	N/A	Approved

Note: These timelines are estimates based on industry norms and recent company disclosures.

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Financial Trajectory and Investment Outlook

Projected Revenue Potential

Based on market size, competitive positioning, and clinical success, revenue estimates are:

Scenario	Annual Revenue (USD Billions)	Assumptions	Likelihood
Optimistic	$1.5 - $2.0	Successful NDA approval, high market adoption	40-50% chance
Pessimistic	<$0.5	Clinical setbacks, regulatory delays	20-30% chance
Moderate	~$0.8	Partial market penetration	30-40%

Key Revenue Drivers

• Market penetration rates: Estimated 20-40% of systemic fungal infection markets within 5 years post-launch.
• Pricing strategy: Premium pricing aligned with novel once-weekly dosing, estimated ~$200-300 per dose.
• Reimbursement and adoption: Favorable health policies could accelerate uptake.

Cost Structure and Investment Needs

• Development costs: Phase 3 trials (~$200-300 million over 3 years).
• Manufacturing expenses: ~$50 per dose at scale.
• Regulatory and commercialization expenses: ~$100 million.

Valuation Models

Using discounted cash flow (DCF) models:

Model	Net Present Value (NPV)	Assumptions	Source Data
Conservative	~$250 million	Moderate market penetration, delayed approval	Industry averages (10% discount rate)
Aggressive	~$600 million	Rapid market adoption, favorable regulations	Based on blockbuster criteria

Note: DCF assumptions include a 10% discount rate and a 10-year product lifecycle.

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Market Entry Barriers and Risks

Risk Factor	Impact	Mitigation Strategies
Clinical failure	High	Robust trial design, interim analysis
Regulatory delays	Moderate	Parallel international submissions
Competitive response	High	Differentiation via dosing, indications
Pricing pressures	Moderate	Value-based pricing and formulary negotiations

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Comparison with Existing and Emerging Therapies

Therapy	Dosing Frequency	Spectrum	Approvals	Key Limitations	Market Positioning
Caspofungin	Daily	Broad	Yes	IV only, cost	Established, now challenged by Rezafungin
Isavuconazole	Daily	Broad-spectrum azole	Yes	Drug interactions	Oral and IV options
Rezafungin	Weekly	Echinocandin	Pending	Clinical data awaiting	Potential game-changer

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Regulatory Environment and Policy Impact

• FDA & EMA: Accelerated pathways for breakthrough antifungal agents.
• Pricing policies: Emphasis on value-based care and antimicrobial stewardship may influence reimbursement.
• Pandemic influence: Increased awareness of fungal co-infections could boost market demand.

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Key Opportunities and Challenges

Opportunities

• Superior dosing schedule enhances patient compliance.
• Potential prophylactic use in immunocompromised populations.
• Broad-spectrum activity positions Rezafungin as a versatile agent.

Challenges

• Achieving regulatory approval depends on clinical efficacy data.
• Market penetration requires overcoming established generics and incumbents.
• Pricing negotiations could limit gross margins.

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Conclusion and Investment Recommendations

Rezafungin acetate embodies a high-potential antifungal therapy with distinctive pharmacokinetics promising sustained market interest. Its success hinges on positive clinical trial outcomes and swift regulatory approval, with an estimated market entry around 2024-2025. Investors should consider its early-stage development risks against its strategic advantages, especially in prophylaxis and outpatient settings.

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Key Takeaways

• Rezafungin’s extended half-life offers a competitive edge over daily echinocandins.
• The global antifungal market is poised for growth driven by rising immunosuppression and antimicrobial resistance.
• Clinical success in Phase 3 trials and efficient regulatory navigation are critical.
• Revenue projections are optimistic but contingent on market access and adoption.
• Strategic partnerships and pricing strategies will influence long-term profitability.

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Frequently Asked Questions

Q1: What distinguishes Rezafungin from existing echinocandins?
Rezafungin’s extended half-life enables once-weekly dosing, reducing treatment burden and improving adherence. Its stability and broad-spectrum activity further differentiate it from competitors.

Q2: What are the main risks associated with investing in Rezafungin?
Key risks include clinical trial failures, regulatory delays, market competition from established agents, and potential pricing restrictions.

Q3: What is the expected timeline for Rezafungin’s market entry?
Assuming successful Phase 3 results, regulatory submission could occur in 2024, with potential approval and commercial launch in 2025.

Q4: How does Rezafungin’s pricing compare with other antifungals?
Premium pricing is anticipated due to its novel dosing and pharmacokinetic profile, potentially ~$200-300 per dose, aligning with or exceeding existing echinocandins.

Q5: What strategic moves could maximize Rezafungin’s market potential?
Partnerships with major healthcare providers, early approval pathways, proactive reimbursement negotiations, and clinical expansion into prophylaxis and outpatient indications are advisable.

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References

[1] MarketResearch.com, "Global Antifungal Market Analysis," 2022.
[2] Cidara Therapeutics Corporate Reports, 2023.
[3] FDA and EMA Regulatory Frameworks, 2022.
[4] Industry Analyst Reports, 2022.