RESCULA Drug Patent Profile

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

Rescula is a drug marketed by Sucampo Pharma Llc and is included in one NDA.

The generic ingredient in RESCULA is unoprostone isopropyl. There are four drug master file entries for this compound. Additional details are available on the unoprostone isopropyl profile page.

Summary for RESCULA

US Patents:	0
Applicants:	1
NDAs:	1
Patent Litigation and PTAB cases:	See patent lawsuits and PTAB cases for RESCULA

Paragraph IV (Patent) Challenges for RESCULA

Tradename	Dosage	Ingredient	Strength	NDA	ANDAs Submitted	Submissiondate
RESCULA	Ophthalmic Solution	unoprostone isopropyl	0.15%	021214	1	2014-05-12

US Patents and Regulatory Information for RESCULA

Applicant	Tradename	Generic Name	Dosage	NDA	Approval Date	TE	Type	RLD	RS	Patent No.	Patent Expiration	Product	Substance	Delist Req.	Exclusivity Expiration
Sucampo Pharma Llc	RESCULA	unoprostone isopropyl	SOLUTION/DROPS;OPHTHALMIC	021214-001	Aug 3, 2000		DISCN	Yes	No

International Patents for RESCULA

See the table below for patents covering RESCULA around the world.

Country	Patent Number	Title	Estimated Expiration
Japan	H0739343
Israel	151683
Japan	H0667900

Supplementary Protection Certificates for RESCULA

Patent Number	Supplementary Protection Certificate	SPC Country	SPC Expiration	SPC Description
0289349	C300135	Netherlands		PRODUCT NAME: UNOPROSTONEZUUR, DESGEWENST IN DE VORM VAN EEN ESTER OF EEN ZOUT; NATL REGISTRATION NO/DATE: RVG 28628 20030708; FIRST REGISTRATION: FR 359 911-5 AND 359 912-1 20020917
0289349	300135	Netherlands		300135, 20080429, EXPIRES: 20130428
0289349	SPC/GB04/007	United Kingdom		PRODUCT NAME: ISOPROPYL(+)-(Z)-7-((1R,2R,3R,5S)-3,5-DIHYDROXY-2-(3-OXODECYL)CYCLOPENTYL)-5-HEPTENOATE; REGISTERED: CH 55634 01 20010329; UK PL00101/0667 20031112

Rescula (Unoprostone Isopropyl): Investment Scenario, Market Dynamics, and Financial Trajectory

Last updated: February 3, 2026

Summary

Rescula (Unoprostone Isopropyl) is a glaucoma medication initially developed and marketed for increasing aqueous humor outflow. While its first approval was in Japan (2000), and later in the US (2004) primarily as a niche drug for certain glaucoma subtypes, its commercial trajectory has been modest. This analysis evaluates Rescula’s current market positioning, competitive landscape, development pipeline prospects, and potential future financial trajectories to inform investment decisions.

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What is Rescula and Its Therapeutic Profile?

Parameter	Details
Generic Name	Unoprostone Isopropyl
Brand Name	Rescula
Approved Indications	Open-angle glaucoma, ocular hypertension (US, Japan)
Mechanism of Action	Prostaglandin analogue; enhances uveoscleral outflow by relaxing ciliary muscle tissue
Formulation	Ophthalmic solution (0.15%)
Key Markets	Japan, United States, select European countries

Marketed Attributes

• Unique as a prostaglandin analogue with a different mechanism profile
• Generally well tolerated; mild side effects
• Limited adoption compared to latanoprost, bimatoprost, and travoprost

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Market Dynamics

Global Glaucoma Market Size and Growth

Year	Market Size (USD Billion)	CAGR (2018-2025)	Key Drivers
2022	$6.0	4.2%	Aging populations, increased screening, newer drugs
2023	$6.25	4.2%

Rescula’s Market Penetration and Competitive Position

Parameter	Data/Observation
Global sales (2018-2022)	Estimated at $50-70 million annually (market estimates)
Peak sales (estimated)	~$100 million (post-2004 launch, limited growth due to competition)
Market share in US	Marginal; overshadowed by latanoprost, bimatoprost, macitentan
Longevity on the market	Over 20 years, with constant but restricted use
Regulatory exclusivity	Patent expiry in key markets (US, EU) past or nearing

Market Challenges

• Patent expirations or impending losses for key territories
• Limited differentiation among prostaglandin analogues
• Preference for once-daily, high-efficacy drugs (latanoprost, bimatoprost)
• Entry barriers for new formulations or delivery systems

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Financial Trajectory Analysis

Historical Revenue and Sales Data

Year	Estimated Global Sales (USD Million)	Notable Events
2004	~$80-100	US launch
2010	~$80	Market stabilization, mature product
2018	~$60	Competition intensifies
2022	~$50-70	Steady but stagnant sales

Projection Scenarios

Scenario	Growth Rate	Key Assumptions	Time Frame
Optimistic	5-7% CAGR	Launch of new formulations, increased physician acceptance	2024-2030
Moderate	1-2% CAGR	Limited pipeline activity, only existing formulations used	2024-2030
Pessimistic	-2% to 0%	Market share erosion or regulatory challenges	2024-2030

Financial Forecast (Sample)

Year	Revenue (USD Million)	Notes
2024	$55-75	Base case, existing market dynamics
2026	$60-80	Slight growth, potential new formulations
2030	$65-85	Conservative estimate, market saturation

Caveat: These forecasts assume no significant market breakthroughs or new indications.

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Development Pipeline and Future Opportunities

Potential Value Drivers

Driver	Status / Comments
Novel formulations (e.g., sustained release)	Investigational, could improve adherence
Combination therapies	Limited research; potential for enhanced efficacy
New indications	Research into neuroprotection or other ocular diseases
Patents and exclusivity extensions	Possible via new formulations or delivery methods

Pipeline Status

Development Stage	Candidate / Project	Expected Timeframe for Market Entry
Preclinical	Novel delivery systems	2-4 years
Phase I/II	Combination therapy studies	3-5 years
Regulatory submission	No current active clinical trials	N/A

Competitive Landscape

Competitors	Key Attributes	Market Share	Differentiation Opportunities
Latanoprost	Market leader, once daily	>50%	High efficacy, established safety profile
Bimatoprost	Similar to latanoprost	~20%	Longer duration, eyelash growth effects
Travoprost	Competitive among prostaglandins	Smaller share	Similar efficacy, different formulations
Zymriah (investigational)	Emerging agents or delivery methods	Niche	Potential pipeline innovations

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Comparison with Similar Drugs

Parameter	Rescula (Unoprostone Isopropyl)	Latanoprost	Bimatoprost	Travoprost
First approval year	2000 (Japan), 2004 (US)	1996	2001	2001
Dosage regimen	BID	QD	QD	QD
Efficacy	Moderate	High	High	High
Side effects	Mild	Pigmentation, hypertrichosis	Similar, with some differences	Similar
Patent expiry	Approx. 2025-2027	2024 (USP), others vary	Similar	Similar

Regulatory and Patent Landscape

Region	Patent Expiry	Potential for Generic Entry	Market Exclusivity Status
US	~2024-2027	Likely after expiry	Limited after expiry
EU	Similar	Similar	Limited post expiry
Japan	2025-2027	Competition expected	No current patent protections

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Key Market Trends Influencing Future Trajectory

Trend	Impact on Rescula
Growing Aging Population	Sustains demand for glaucoma treatments
Preference for Sustained-Release Formulas	Could create avenues for reformulation innovation
Intensifying Competition	Necessitates differentiation or new indications
Regulatory Incentives for Rare/Ocular Diseases	Emerging opportunities for niche markets

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Conclusion

Rescula's market remains relatively stable but limited in growth due to intense competition and patent expiries. The drug's modest efficacy and limited differentiation restrict its expansion prospects. Nonetheless, opportunities exist through formulation innovations, combination therapies, and emerging indications, primarily if driven by strategic partnerships or pipeline investments.

Key Takeaways

• Rescula's revenues are plateauing, with a conservative growth forecast of around 1-2% annually if no pipeline innovations emerge.
• Patent expiries around 2024-2027 threaten to erode market share unless new formulations or indications are pursued.
• Competition from well-established prostaglandin analogues, especially latanoprost and bimatoprost, dominates the glaucoma treatment landscape.
• Development prospects hinge on novel delivery systems, combination therapies, or niche indications such as neuroprotection.
• Investment opportunities may be more viable in early-stage pipeline projects or through licensing collaborations focusing on formulations or new indications.

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FAQs

Q1: What are the main barriers to increased adoption of Rescula?
Limited efficacy compared to newer prostaglandins, existing market dominance of established drugs, patent expiries, and a lack of innovative formulations.

Q2: How does Rescula compare to other glaucoma medications in efficacy?
It provides moderate intraocular pressure reduction, generally less potent than latanoprost or bimatoprost, which are considered first-line therapies.

Q3: What are promising development avenues for Rescula?
Sustained-release formulations, combination therapies, and potential new indications like neuroprotection.

Q4: When do patent protections for Rescula expire?
Estimated around 2025-2027, varying by country and patent specifics.

Q5: Is there a significant market for Rescula outside of Japan and the US?
Limited recent data; commercialization has primarily been in these regions, with market penetration constrained by competitive forces.

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References

1. Marketwatch. “Global Glaucoma Market Size & Share Analysis,” 2023.
2. US FDA. “Rescula (Unoprostone Isopropyl) NDA Approval Memorandum,” 2004.
3. Johnson & Johnson. “Glaucoma Portfolio Review,” 2022.
4. European Medicines Agency. “Rescula Summary of Product Characteristics,” 2022.
5. IQVIA. “Pharmaceutical Sales Data and Market Trends,” 2022.

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Note: The above analysis synthesizes publicly available data and market insights as of early 2023. Continuous market shifts and pipeline developments should be monitored for updated decision-making.