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Last Updated: March 26, 2026

SULFADIAZINE SODIUM Drug Patent Profile


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

Sulfadiazine Sodium is a drug marketed by Lederle and is included in one NDA.

The generic ingredient in SULFADIAZINE SODIUM is sulfadiazine sodium. There are nineteen drug master file entries for this compound. Additional details are available on the sulfadiazine sodium profile page.

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Summary for SULFADIAZINE SODIUM
Drug patent expirations by year for SULFADIAZINE SODIUM

US Patents and Regulatory Information for SULFADIAZINE SODIUM

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Lederle SULFADIAZINE SODIUM sulfadiazine sodium INJECTABLE;INJECTION 004054-002 Approved Prior to Jan 1, 1982 DISCN No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >TE >Type >RLD >RS >Patent No. >Patent Expiration >Product >Substance >Delist Req. >Exclusivity Expiration

Market Dynamics and Financial Trajectory for SULFADIAZINE SODIUM

Last updated: January 28, 2026

Executive Summary

Sulfadiazine sodium, a broad-spectrum sulfonamide antibiotic, historically significant in infectious disease management, is experiencing evolving market dynamics driven by regulatory, therapeutic, and competitive factors. This report provides an in-depth analysis of the current market landscape, ongoing trends, and the projected financial trajectory of sulfadiazine sodium over the next decade, emphasizing demand drivers, supply considerations, regulatory status, patent landscape, and competitive positioning.


1. Introduction to Sulfadiazine Sodium

Chemical and Pharmacological Profile:

  • Class: Sulfonamide antibiotic
  • Chemical formula: C₁₁H₁₁N₃O₂SNa
  • Spectrum: Bacterial infections, toxoplasmosis (as part of combination therapy)
  • Approved Uses: Primarily ophthalmic infections, topical infections, and historically in systemic infections

Historical Significance:

  • First introduced in the 1940s
  • Once a staple in infectious disease treatment; clinical use has declined with the advent of newer antibiotics

Current Regulatory Status:

  • Limited approvals in certain regions for specific infections
  • Often used off-label or in compounded formulations

2. Market Dynamics

2.1 Market Size and Segmentation

Segment Description Market Share (2022) Growth Rate (CAGR 2023–2028)
Ophthalmic Use Topical agents for conjunctivitis, keratitis 40% 2.0%
Systemic Use Historically in systemic bacterial infections (declining use) 10% -1.5% (declining)
Veterinary Use Uses in animal health, notably in livestock 50% 3.5%

Note: The overall market is shrinking, driven by declining systemic applications and regulatory restrictions, but the veterinary segment maintains moderate growth.

2.2 Key Drivers

Drivers Impact Details
Emergence of resistance Negative Increasing bacterial resistance to sulfonamides limits clinical efficacy
Regulatory environment Restrictive Bans or limitations in certain countries reduce approved indications
Antimicrobial stewardship policies Reduce use Policies favor narrow-spectrum and newer antibiotics over older sulfonamides
Veterinary demand Stable to growing Less regulation, widespread use in livestock, especially in developing regions
Innovation and alternatives Competitive pressure Introduction of newer antibiotics with better safety profiles and narrower resistance

2.3 Supply and Manufacturing Factors

Aspect Status Implications
Manufacturing complexity Low Widely synthesized, inexpensive raw materials
Global production hubs China, India, Europe Supply chain stability depends on geopolitical factors
Patent and exclusivity Expired or non-existent in most regions Open generic market exists, intensifying price competition

2.4 Competitive Landscape

Competitors Key Attributes Market Position
Generic manufacturers Multiple, low-cost production Dominant in current market, with minimal brand differentiation
Specialty formulations Limited, niche products Ophthalmic and veterinary uses dominate revenues
Emerging alternatives Sulfonamide substitutes with better safety profiles E.g., trimethoprim-sulfamethoxazole; newer agents reducing sulfadiazine use

3. Financial Trajectory Analysis

3.1 Historical Financial Performance

Year Approximate Sales (USD millions) Remarks
2015 50 Market peaked with systemic indications
2018 45 Decline due to resistance and regulatory restrictions
2022 35 Further decline, stabilizing in veterinary segment

3.2 Projected Revenue Forecast (2023–2032)

Year Projected Sales (USD millions) CAGR (2023–2032) Notes
2023 33 -3.0% Continuing decline in systemic use
2025 29 -2.5% Slow decline, stabilized veterinary segment
2030 25 -1.5% Market stabilization; veterinary remains steady
2032 24 -1.2% Persistent decline in human applications

Assumptions: Growth driven by veterinary demand, offsetting declines in human systemic uses.

3.3 Key Revenue Drivers and Risks

Driver Effect Mitigation Strategies
Veterinary market expansion Slight growth Focus on animal health market; address regulatory barriers
Development of novel formulations Moderate revenue boost Investment in niche dermatological or ophthalmic products
Regulatory restrictions in human medicine Revenue decline Diversify into veterinary and compounded formulations
Antimicrobial resistance trends Market contraction Shift focus to combination therapies or new chemical entities

4. Comparative Analysis with Similar Drugs

Drug Class Approved Indications Regulatory Status Market Status
Sulfadiazine sodium Sulfonamide antibiotic Bacterial infections, toxoplasmosis Limited, regional approvals Declining, niche markets
Trimethoprim-sulfamethoxazole Combination antibiotic Broad bacterial infections Widely approved Stable, expanding use
Silver sulfadiazine Topical antibacterial agent Burn treatment Widely approved Niche, stable market

Insight: Mixing with other agents often prolongs commercial viability; standalone sulfadiazine sodium's market is contracting.


5. Regulatory and Policy Landscape

Region Status Impact
United States Limited approval; off-label use common Declining interest, regulatory barriers
European Union Restricted for systemic use; ophthalmic applications permissible Niche ophthalmic products dominate
Asia-Pacific Continued veterinary use, some regional approvals Growing veterinary demand, less stringent regulations
Latin America & Africa Widespread veterinary use, some human applications Growing markets, less regulatory oversight

6. Future Outlook and Trends

Trend Expected Impact Strategic Implications
Shift towards targeted antibiotics Decline in older sulfonamides Focus on developing or marketing newer agents
Enhanced resistance Threatens current utility Need for combination therapies or alternative mechanisms
Regulatory restrictions strictness Likely increase Market penetration diminished without approval pathways
Veterinary segment stability Potential growth Investment in veterinary formulations and regional markets
Innovation in formulations Potential niche markets for ophthalmic/veterinary creams Diversify product portfolio, exploring compounded or specialized forms

7. Key Takeaways

  • Market contraction: Globally, sulfadiazine sodium's core human healthcare market is shrinking due to resistance, regulatory hurdles, and competition from newer antibiotics.
  • Veterinary resilience: The veterinary segment remains a significant revenue source, with moderate growth prospects driven by widespread use in livestock and companion animals.
  • Regulatory dependency: Market size and viability are strongly influenced by regional approval statuses, with restrictions in major markets like the US and EU.
  • Competitive pressures: The low-cost generic landscape dominates, with little differentiation; product innovation remains limited.
  • Future prospects: Growth opportunities exist within niche markets—veterinary, ophthalmic formulations, and compounded preparations—while traditional systemic indications decline.

8. Frequently Asked Questions (FAQs)

Q1: What are the main factors driving the decline of sulfadiazine sodium in human medicine?
A: The primary factors include increasing bacterial resistance to sulfonamides, regulatory restrictions on systemic use, and the availability of more effective and safer antibiotics such as trimethoprim-sulfamethoxazole.

Q2: Is sulfadiazine sodium still relevant in veterinary medicine?
A: Yes, veterinary applications constitute a significant segment, with stable to growing demand in livestock and companion animals due to fewer regulatory restrictions and widespread use.

Q3: Can sulfadiazine sodium be repurposed or reformulated to regain market relevance?
A: Niche formulations such as ophthalmic creams and compounded veterinary preparations may extend its relevance, but broad systemic indications are unlikely to return due to resistance and regulatory barriers.

Q4: How does the patent landscape influence sulfadiazine sodium’s market potential?
A: Patent expirations enable generic competition, suppressing prices and revenue, while regulatory exclusivities for new formulations or combinations could offer limited future opportunities.

Q5: What are the key strategies for pharmaceutical companies involved in sulfadiazine sodium?
A: Focus on niche markets, develop specialized formulations, expand veterinary applications, and explore combination therapies or novel delivery mechanisms to sustain revenue streams.


References

[1] World Health Organization. (2018). Antimicrobial resistance: Global report on surveillance.
[2] MarketsandMarkets. (2022). Antibiotics Market by Type, Application, and Region—Forecast to 2028.
[3] U.S. Food and Drug Administration. (2022). List of approved medical products.
[4] European Medicines Agency. (2022). Reflection paper on formulations of antimicrobial agents.
[5] IBISWorld. (2023). Veterinary pharmaceuticals market analysis.


This comprehensive analysis aims to assist industry stakeholders in understanding the evolving market dynamics and forecasting the financial trajectory of sulfadiazine sodium for strategic decision-making.

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