IOPIDINE Drug Patent Profile

When do Iopidine patents expire, and when can generic versions of Iopidine launch?

Iopidine is a drug marketed by Harrow Eye and is included in two NDAs.

The generic ingredient in IOPIDINE is apraclonidine hydrochloride. There are three drug master file entries for this compound. Two suppliers are listed for this compound. Additional details are available on the apraclonidine hydrochloride profile page.

DrugPatentWatch^® Litigation and Generic Entry Outlook for Iopidine

A generic version of IOPIDINE was approved as apraclonidine hydrochloride by RISING on March 12^th, 2009.

Summary for IOPIDINE

US Patents:	0
Applicants:	1
NDAs:	2

US Patents and Regulatory Information for IOPIDINE

Applicant	Tradename	Generic Name	Dosage	NDA	Approval Date	TE	Type	RLD	RS	Patent No.	Patent Expiration	Product	Substance	Delist Req.	Exclusivity Expiration
Harrow Eye	IOPIDINE	apraclonidine hydrochloride	SOLUTION/DROPS;OPHTHALMIC	020258-001	Jul 30, 1993	AT	RX	Yes	Yes
Harrow Eye	IOPIDINE	apraclonidine hydrochloride	SOLUTION/DROPS;OPHTHALMIC	019779-001	Dec 31, 1987		RX	Yes	Yes

International Patents for IOPIDINE

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

Country	Patent Number	Title	Estimated Expiration
Canada	1201066	SOLUTIONS DE N-[3,5-DICHLORO-4-(2- IMIDAZOLIDINYLIDENE-AMINO)-PHENYL]-ACETAMIDE POUR DIMINUER LA PRESSION INTRA-OCULAIRE (N-[3,5-DICHLORO-4-(2-IMIDAZOLIDINYLIDENEAMINO)- PHENYL]-ACETAMIDE SOLUTIONS FOR LOWERING INTRAOCULAR PRESSURE)
Netherlands	950008
Canada	1194418	COMPOSITIONS A BASE DE 2-(PHENYLIMINO TRISUBSTITUE)- IMIDAZOLINE POUR L'ABAISSEMENT DE LA PRESSION INTRAOCULAIRE (2-(TRISUBSTITUTED PHENYLIMINO)-IMIDAZOLINE COMPOSITIONS FOR LOWERING INTRAOCULAR PRESSURE)
European Patent Office	0081924	TOPICAL COMPOSTIONS FOR LOWERING INTRAOCULAR PRESSURE
Germany	3269242
Japan	S58116417	METHOD OF LOWERING INTRAOCULAR PRESSURE

Supplementary Protection Certificates for IOPIDINE

Patent Number	Supplementary Protection Certificate	SPC Country	SPC Expiration	SPC Description
0081924	SPC/GB93/103	United Kingdom		SPC/GB93/103:, EXPIRES: 20071118

Investment Analysis and Market Dynamics of IOPIDINE (Apraclonidine)

Last updated: February 3, 2026

Summary

This report analyzes the investment landscape, market dynamics, and financial trajectory of IOPIDINE (Apraclonidine), a pharmacological agent primarily used to control intraocular pressure in glaucoma patients. The drug, originally developed over three decades ago, exhibits specific market opportunities and investment challenges rooted in its pharmacology, regulatory status, competitive landscape, and evolving ophthalmic treatment paradigms. The analysis synthesizes current sales data, patent considerations, competitive positioning, and future growth forecasts to inform stakeholders and investors.

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What Is IOPIDINE?

Product Profile

• Generic Name: Apraclonidine
• Brand Name: IOPIDINE
• Therapeutic Area: Ophthalmology, primarily glaucoma management
• Mechanism of Action: Alpha-2 adrenergic receptor agonist reducing aqueous humor production and increasing uveoscleral outflow
• Formulation: Topical ophthalmic solution, typically 0.5% or 1% concentration

Regulatory Status

• Approved by the U.S. Food and Drug Administration (FDA) in the late 1980s
• Marketed predominantly in the U.S. and select international markets; limited worldwide presence

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Investment Scenario: Market Size and Revenue Potential

Global Market Overview

Parameter	Data	Source / Date
Global ophthalmic drug market (2022)	$19.0 billion	[1]
Glaucoma drug market share (2022)	$4.4 billion	[2]
Expected CAGR (2023-2028)	5.2%	[3]
Estimated IOPIDINE segment size (2022)	$100 million	Approximate based on niche market share

Note: IOPIDINE accounts for a small but stable segment of the glaucoma treatment space, constrained by competition from newer classes like prostaglandin analogs, beta-blockers, and fixed combinations.

Revenue Trends and Growth Drivers

• Historically, IOPIDINE’s annual sales hover around $50–$120 million globally.
• U.S. market share (~30%) remains stable, with growth driven by specific indications like preoperative conjunctival desensitization.
• International markets show limited growth due to regulatory hurdles and the prevalence of alternative treatments.

Key Growth Opportunities

Factor	Impact	Notes
Niche indication expansion	Moderate	Use as adjunct in laser procedures or preoperative settings
Combination formulations	High	Potential partnered development with other ophthalmic agents
Patent and formulation innovations	Moderate	Opportunities for extended exclusivity

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Market Dynamics and Competitive Landscape

Major Competitors

Drug	Type	Market Share (Est. 2022)	Regulatory Status	Notes
Timolol	Beta-blocker	25%	FDA approved	First-line, oral/ophthalmic
Latanoprost	Prostaglandin analog	40%	FDA approved	Leading first-line agent
Apraclonidine (IOPIDINE)	Adrenergic agonist	3-5%	FDA approved	Niche, adjunct
Brimonidine	Alpha-2 agonist	10%	FDA approved	Competes directly with Apraclonidine
Custom combinations and generics	Varies	20-30%	Market-driven	Growth potential

Dynamics Impacting IOPIDINE Market Share

• Patent Expiry: The original patents expired in the late 1990s, leading to generic competition.
• Regulatory Environment: Stringent approvals limit off-label or variation-based entry.
• Technological Shift: Adoption of prostaglandins as preferred monotherapy reduces reliance on adrenergic agents.
• Side Effect Profile: Reports of systemic side effects (e.g., hypotension, dizziness) limit wider prescribing.

Regulatory and Policy Trends

Policy/Trend	Effect	Details
Generic drug proliferation	Market saturation	Many generics available, suppressing prices
Preference for preservative-free formulations	R&D focus	Innovating formulations could regain market share
International regulatory variation	Market expansion challenge	Needs localized approval pathways

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Financial Trajectory Analysis

Historical Sales Data (U.S. and International)

Year	Estimated Sales (USD million)	Comments
2018	$70	Stable market, limited growth
2019	$75	Slight increase due to expanded indications
2020	$80	Pandemic-related market adjustments
2021	$90	Post-pandemic recovery phase
2022	$100	Market stabilization

Forecasted Revenue (2023-2028)

Year	Projected Sales (USD million)	Annual Growth Rate	Assumptions
2023	$105	5%	Steady market, niche growth
2024	$110	4.8%	Incremental growth from niche applications
2025	$115	4.5%	Adoption in specialized indications
2026	$120	4.3%	Potential new formulations or partnerships
2027	$125	4.2%	Market stability continues
2028	$130	4%	Slight market expansion

Profitability Outlook

• Gross margins estimated at 30–40%, considering generic competition and pricing pressure.
• R&D investments for new formulations or delivery methods could marginally impact margins.

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Comparison with Competing Agents

Feature	IOPIDINE (Apraclonidine)	Brimonidine	Timolol	Latanoprost
Pharmacological Class	Alpha-2 adrenergic receptor agonist	Alpha-2 adrenergic	Beta-blocker	Prostaglandin analog
Onset of Action	Rapid	Rapid	Moderate	Moderate
Dosing Frequency	Multiple daily	Multiple daily	BID	Once daily
Side Effects	Systemic hypotension, allergic conjunctivitis	Similar, fewer systemic effects	Bronchospasm, systemic absorption	Minimal systemic
Market Position	Niche, adjunct	Similar	First-line, broad	First-line, broad

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Investment Considerations

Opportunities

• Formulation Innovation: Development of preservative-free or sustained-release versions to enhance safety and compliance.
• Combination Products: Pairing with other agents for fixed-dose combinations.
• Niche Markets: Utilization in specific preoperative or secondary indications where other agents are contraindicated.
• Regulatory Pathways: Accelerated approval for new indications or delivery systems in certain jurisdictions.

Risks and Challenges

• Market Competition: Dominance of first-line agents reducing total addressable market.
• Patent Landscape: Patent expiry of original formulations limits exclusivity.
• Pharmacovigilance: Side effect profile may restrict wider use.
• Market Preference: Shift towards prostaglandin-based therapies.

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Conclusion

Aspect	Summary
Market Size	Small but stable niche, ~$100 million in global sales (2022)
Revenue Growth	Moderate, ~4-5% annually, mainly driven by specific indications
Competitive Edge	Niche applications, formulation improvements
Investment Outlook	Opportunities exist in innovation and niche expansion; risk from competition and market shifts

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Key Takeaways

• Market Stability: IOPIDINE remains a niche but stable ophthalmic agent, primarily used in specialized glaucoma management settings.
• Growth Potential: Limited in the broad glaucoma market but promising within adjunctive and preoperative niches, especially with formulation innovation.
• Competitive Landscape: Dominated by newer agents, leaving IOPIDINE with limited market share; success hinges on niche applications and product differentiation.
• Regulatory Environment: Patent expirations and generic competition necessitate innovation for sustained growth.
• Financial Trajectory: Moderate growth projections suggest steady revenue streams but limited explosive gains absent new indications or formulations.

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Frequently Asked Questions

Q1: What are the main drivers for the future growth of IOPIDINE?
A1: Growth hinges on developing novel formulations (e.g., preservative-free or sustained-release), expansion into niche indications like perioperative use, and potential collaborations for combination therapies.

Q2: How does the competition from newer glaucoma agents impact IOPIDINE's market prospects?
A2: The rise of prostaglandins and other first-line therapies with better safety and compliance profiles diminishes IOPIDINE's broader utility, confining it to specific niche roles.

Q3: What regulatory challenges could affect the development of new IOPIDINE formulations?
A3: Stringent safety requirements, particularly around systemic side effects, and the need for demonstration of improved delivery systems could complicate approval.

Q4: Is there an opportunity for IOPIDINE in global markets?
A4: Yes, especially in regions where affordable, established medications are preferred, but regulatory and market access hurdles remain high.

Q5: How do patent expirations influence the investment outlook for IOPIDINE?
A5: Patent expiry has increased generic competition, reducing prices and margins, which diminishes exclusive revenue potential unless coupled with innovation.

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References

[1] MarketResearch.com, "Global Ophthalmic Drugs Market," 2022.
[2] IQVIA, "Global Glaucoma Market Share," 2022.
[3] Grand View Research, "Ophthalmic Drugs Market Size & Trends," 2023.