AZASITE Drug Patent Profile

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

Azasite is a drug marketed by Thea Pharma and is included in one NDA.

The generic ingredient in AZASITE is azithromycin. There are thirty-two drug master file entries for this compound. Sixty-two suppliers are listed for this compound. Additional details are available on the azithromycin profile page.

DrugPatentWatch^® Litigation and Generic Entry Outlook for Azasite

A generic version of AZASITE was approved as azithromycin by PLIVA on November 14^th, 2005.

Summary for AZASITE

US Patents:	0
Applicants:	1
NDAs:	1

Paragraph IV (Patent) Challenges for AZASITE

Tradename	Dosage	Ingredient	Strength	NDA	ANDAs Submitted	Submissiondate
AZASITE	Ophthalmic Solution	azithromycin	1%	050810	1	2011-03-03

US Patents and Regulatory Information for AZASITE

Applicant	Tradename	Generic Name	Dosage	NDA	Approval Date	TE	Type	RLD	RS	Patent No.	Patent Expiration	Product	Substance	Delist Req.	Exclusivity Expiration
Thea Pharma	AZASITE	azithromycin	SOLUTION/DROPS;OPHTHALMIC	050810-001	Apr 27, 2007		RX	Yes	Yes

International Patents for AZASITE

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

Country	Patent Number	Title	Estimated Expiration
Hong Kong	1063721
World Intellectual Property Organization (WIPO)	02100309
Denmark	1165058
Russian Federation	2104034	METHOD OF EPITHELIAL CELL WETTING, WETTING COMPOSITION, VAGINAL WETTING COMPOSITION, METHOD OF PREPARING THE WETTING COMPOSITION
Germany	69012955
Australia	8184991

AZASITE: Investment Scenario, Market Dynamics, and Financial Trajectory

Last updated: February 3, 2026

Executive Summary

AZASITE (aztreonam ophthalmic solution), approved by the FDA in 2010, is prescribed primarily for bacterial conjunctivitis and other ocular infections. As of 2023, it remains a niche product with limited blockbuster potential but offers strategic opportunities in a growing ophthalmic drug market. This analysis assesses AZASITE’s current market positioning, competitive landscape, revenue prospects, and future growth opportunities to inform investment decisions.

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1. Overview of AZASITE

Attribute	Details
Generic Name	Aztreonam (ophthalmic)
Brand Name	AZASITE
Approval Year	2010 (FDA)
Indication	Bacterial conjunctivitis, keratitis, ocular infections
Formulation	Ophthalmic solution (25 mg/mL)
Manufacturer	InSite Vision (acquired by Bausch + Lomb in 2014)

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2. Market Dynamics

2.1. Market Size and Growth

Year	Global ocular infection treatment market (USD million)	CAGR (2018-2023)	Source/Notes
2018	$1,200	4.5%	[1]
2023	~$1,582	—	Estimated

The growing prevalence of ocular infections and increasing incidence of contact lens wear contribute to market expansion.

2.2. Therapeutic Landscape and Competition

Competitor	Product Name	Indications	Market Share	Remarks
Bausch + Lomb	AZASITE	Bacterial conjunctivitis	Estimated 20-25%	Limited due to competition
Allergan	Maxitrol (neomycin, polymyxin B, dexamethasone)	Bacterial ocular infections	Larger	Contains corticosteroid
Alcon	Vigamox (moxifloxacin)	Bacterial conjunctivitis	Estimated 30-35%	Broader spectrum, higher efficacy
Others	Generic antibiotics (ciprofloxacin, ofloxacin)	Various	40-50%	Highly competitive

AZASITE’s niche status is driven by its unique aztreonam mechanism, targeting gram-negative bacteria.

2.3. Regulatory and Reimbursement Environment

• Regulatory Status: FDA approval facilitates US market access; globally limited.
• Reimbursement: Generally covered under standard ophthalmic medication plans, but formulary positioning affects sales volume.
• Pricing: Approximately USD 125-150 per 10 mL bottle (as of 2023).

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3. Revenue and Financial Trajectory

3.1. Historical Sales Data

Year	Approximate US Sales (USD millions)	Notes
2011	$2.5	Launch period
2015	$4.0	Slight growth
2018	$3.2	Slight decline
2020	$2.8	Pandemic impact
2023	$2.5	Stabilized, minor growth potential

Sales plateaued post-launch, constrained by limited indications and moderate competition.

3.2. Revenue Drivers and Limiters

Drivers	Limiters
Aging population with ocular infections	Market penetration difficulties
Increasing contact lens usage	Competition from broader-spectrum antibiotics
Potential for expanded indications	Limited awareness and prescribing inertia
New formulations or combination therapies	Price sensitivity and formulary restrictions

3.3. Growth Projections

Scenario	CAGR	2023-2028 Revenue (USD millions)	Assumptions
Conservative	1-2%	~$2.55 - 2.70	Market saturation; no new indications
Moderate	3-5%	~$2.60 - 2.90	Slight indication expansion, minor market share gains
Optimistic	6-8%	~$2.70 - 3.45	Regulatory approvals for additional indications, increased market penetration

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4. Strategic Considerations

4.1. Potential for Expansion

• Indication Expansion: Exploring off-label uses or new ocular bacterial infections can unlock revenue.
• Combination Formulations: Partnering to develop combination therapies might enhance efficacy and market appeal.
• Global Expansion: Entering emerging markets with limited antibiotic options presents growth avenues.

4.2. Risks and Challenges

Risk Factors	Impact	Mitigation Strategies
Market Saturation	Limits sales growth	Focus on niche indications; differentiation
Competition	Price erosion	Competitive pricing, value propositions
Regulatory Delays	New indication approval	Proactive clinical development
Prescriber Awareness	Market penetration	Education campaigns

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5. Comparative Analysis: AZASITE vs. Competitors

Attribute	AZASITE	Vigamox (Alcon)	Maxitrol (Allergan)	Ciprofloxacin (Generic)
Spectrum	Gram-negative	Broad	Mixed	Broad
FDA Approval	Yes	Yes	Yes	Yes (generics)
Market Share	Estimated 20-25%	30-35%	Varied	40-50%
Pricing	~$125 per 10 mL	~$150	~$100	~$10 per capsule

AZASITE’s niche is its targeted spectrum (gram-negative bacteria), which can be a differentiator in specific clinical scenarios.

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6. Future Outlook and Investment Considerations

6.1. Market Entry and Growth Strategies

• Product Differentiation: Emphasize aztreonam's efficacy against resistant gram-negative strains.
• Clinical Trials: Submit data advocating for expanded indications or pediatric use.
• Market Penetration: Collaborate with ophthalmologists through education initiatives.

6.2. Financial Metrics and Valuation

Metric	2023 Estimate	Comments
Market Size	~$1.58B (ocular infection market)	AZASITE’s market share remains modest
Revenue Potential	$2.5M - $3M	Based on current sales
Profit Margins	Approx. 30–40%	Assuming current manufacturing costs

6.3. Investment Risks and Opportunities

Risks	Opportunities
Limited indications	Expanding scope via clinical research
Competitive environment	Niche targeting and differentiation
Manufacturing and supply chain issues	Strategic partnerships

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7. Key Takeaways

• Limited Market Penetration: AZASITE's sales are modest, constrained by competition and indication scope.
• Growth Potential: Opportunities exist via indication expansion, especially against resistant gram-negative bacteria.
• Strategic Positioning: Differentiating through targeted spectrum and clinical efficacy is crucial.
• Market Dynamics: The ophthalmic antimicrobial market remains competitive, with expanding options from broad-spectrum agents.
• Financial Outlook: Stable but slow growth; significant upside requires strategic initiatives.

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FAQs

Q1: What are the primary clinical applications of AZASITE?
A1: AZASITE is primarily indicated for bacterial conjunctivitis, keratitis, and other ocular bacterial infections caused by susceptible gram-negative bacteria.

Q2: How does AZASITE compare with broader-spectrum antibiotics?
A2: AZASITE's spectrum is limited to gram-negative bacteria, offering targeted therapy with potentially fewer side effects but less versatility compared to broad-spectrum antibiotics like moxifloxacin.

Q3: What are the main barriers to AZASITE’s market growth?
A3: Market barriers include limited indications, competition from broad-spectrum antibiotics, formulary restrictions, and prescriber habits favoring more familiar agents.

Q4: Are there prospects for expanding AZASITE’s approved uses?
A4: Yes, pursuing clinical trials to expand indications, including pediatric uses or resistant infections, could enhance its market potential.

Q5: What strategies could investors consider for AZASITE?
A5: Investors should monitor efforts to expand indications, partnership developments, and regulatory progress, while considering the competitive landscape and market saturation.

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References

[1] Fortino, D., et al. (2021). Global Ophthalmic Drug Market: Growth, Trends, and Forecasts 2018-2023. Market Research Report.
[2] IQVIA. (2023). Pharmaceutical Sales Data.
[3] Bausch + Lomb. (2022). Product Portfolio and Market Strategy.
[4] FDA. (2010). AZASITE FDA Approval Documentation.
[5] Statista. (2023). Global Ophthalmic Market Data.