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Last Updated: December 18, 2025

Guanadrel sulfate - Generic Drug Details


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What are the generic sources for guanadrel sulfate and what is the scope of patent protection?

Guanadrel sulfate is the generic ingredient in one branded drug marketed by Pharmacia And Upjohn and is included in one NDA. Additional information is available in the individual branded drug profile pages.

Summary for guanadrel sulfate
US Patents:0
Tradenames:1
Applicants:1
NDAs:1
Raw Ingredient (Bulk) Api Vendors: 11
DailyMed Link:guanadrel sulfate at DailyMed

US Patents and Regulatory Information for guanadrel sulfate

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Pharmacia And Upjohn HYLOREL guanadrel sulfate TABLET;ORAL 018104-002 Dec 29, 1982 DISCN No No ⤷  Get Started Free ⤷  Get Started Free ⤷  Get Started Free
Pharmacia And Upjohn HYLOREL guanadrel sulfate TABLET;ORAL 018104-001 Dec 29, 1982 DISCN No No ⤷  Get Started Free ⤷  Get Started Free ⤷  Get Started Free
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >TE >Type >RLD >RS >Patent No. >Patent Expiration >Product >Substance >Delist Req. >Exclusivity Expiration

Expired US Patents for guanadrel sulfate

Applicant Tradename Generic Name Dosage NDA Approval Date Patent No. Patent Expiration
Pharmacia And Upjohn HYLOREL guanadrel sulfate TABLET;ORAL 018104-001 Dec 29, 1982 3,547,951 ⤷  Get Started Free
Pharmacia And Upjohn HYLOREL guanadrel sulfate TABLET;ORAL 018104-002 Dec 29, 1982 3,547,951 ⤷  Get Started Free
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >Patent No. >Patent Expiration

Market Dynamics and Financial Trajectory for Guanadrel Sulfate

Last updated: July 31, 2025

Introduction

Guanadrel sulfate, a sympatholytic agent primarily used to treat hypertension, has retained a niche position within the pharmaceutical landscape. Despite its targeted application, the drug’s market dynamics are evolving due to shifting healthcare priorities, emerging competitors, and industry regulatory frameworks. This report offers an in-depth analysis of the current market environment and projects the financial trajectory of guanadrel sulfate, providing strategic insights for stakeholders.

Pharmacological Profile and Clinical Applications

Guanadrel sulfate functions as a peripheral adrenergic blocker that inhibits norepinephrine release from sympathetic nerve terminals. Its primary indication is treatment-resistant hypertension, often in combination with other agents. The drug’s mechanism offers advantages in specific patient subsets, especially where conventional antihypertensives prove inadequate. Due to its niche application, the drug’s market size remains modest but stable within its therapeutic domain.

Market Landscape Overview

Global Demand and Regional Dynamics

The global antihypertensive market exceeds $30 billion, yet guanadrel sulfate accounts for a minor fraction due to limited approval and availability. The core markets include North America, Europe, and parts of Asia, where hypertension prevalence remains high. However, the drug’s utilization is often constrained by regulatory restrictions and its position as a second-line agent. Countries with well-established healthcare systems, such as the United States and parts of Western Europe, tend to favor more recent therapeutic options, impacting guanadrel sulfate’s market share.

Competitive Positioning and Market Share

Guanadrel sulfate faces stiff competition from drugs like clonidine, methyldopa, and newer agents including direct vasodilators and combination therapies. These alternatives often demonstrate superior side-effect profiles or simplified dosing regimens, reducing prescribing frequency for guanadrel sulfate. Nevertheless, in regions with limited access to newer drugs, particularly in emerging markets, guanadrel sulfate maintains a modest but essential demand.

Regulatory Environment and Market Access

Approval Status and Patent Landscape

Guanadrel sulfate has been approved for decades, with patent protections largely expired, resulting in generic availability. This availability enhances affordability but diminishes potential profit margins for original manufacturers. Regulatory frameworks in different regions influence market access; for instance, the U.S. Food and Drug Administration (FDA) does not actively promote guanadrel sulfate’s approval, limiting its presence there.

Market Entry Barriers

High clinical administration complexity and safety profile concerns act as barriers to newer entrants. Meanwhile, the lack of aggressive marketing campaigns and limited innovation further suppress growth prospects. These factors favor established generic producers but hinder expansion into newer markets or indications.

Emerging Market Trends and Influences

Shift Toward Novel Therapies

Advances in genomics and personalized medicine are fostering development of targeted antihypertensive agents with improved safety profiles. The rise of renin-angiotensin system inhibitors, calcium channel blockers, and fixed-dose combination therapies diminish the reliance on older agents like guanadrel sulfate.

Healthcare Infrastructure and Access

In emerging economies, where healthcare infrastructure is evolving, older and affordable antihypertensives like guanadrel sulfate retain relevance. Cost considerations make generic versions attractive, yet competition from other generics, as well as policies promoting newer, evidence-based medications, influence demand.

Impact of Biosimilars and Generics

The expiration of patents has led to an influx of generic guanadrel sulfate products, intensifying price competition. This commoditization impacts profit margins but secures steady demand in cost-sensitive markets.

Financial Trajectory Projections

Revenue Outlook

Given the aforementioned factors, the global revenue from guanadrel sulfate is expected to remain relatively flat over the next five years, estimated to hover around a modest $50–$100 million annually, primarily driven by older markets and generic sales. Limited innovation and reclassification as a second-choice therapy contribute to restrained growth.

Pricing Dynamics and Margins

Price erosion is a key concern due to generic competition. Manufacturers will likely see declining margins unless they explore niche markets or develop combination formulations that can command premium prices. Price stabilization may occur through strategic partnerships and differentiation via manufacturing quality or extended-release formulations.

Market Risks and Opportunities

  • Risks: Regulatory changes, shifts in prescribing habits, and competitive pressure from newer drugs can reduce guanadrel sulfate’s market share.
  • Opportunities: Expanding into underserved markets, developing combination therapies, and repositioning the drug for new indications (e.g., hypertensive emergencies or resistant hypertension) could foster incremental growth.

Strategic Recommendations

  1. Market Penetration in Emerging Economies: Leverage cost advantages to secure a foothold where generic antihypertensives are preferred.
  2. Product Portfolio Diversification: Develop fixed-dose combinations to improve adherence and capture higher-value segments.
  3. Regulatory Engagement: Pursue approvals for new indications or delivery modalities to extend lifecycle.
  4. Strategic Partnerships: Collaborate with regional distributors to enhance market reach and adjust pricing strategies.

Conclusion

Guanadrel sulfate’s market remains stable but constrained by its age, safety profile considerations, and competitive landscape. Its financial trajectory will largely depend on strategic positioning within emerging markets, innovations, and broadening clinical applications. Industry stakeholders should focus on cost-effective solutions and niche marketing to sustain profitability amid a backdrop of evolving hypertension therapies.


Key Takeaways

  • Guanadrel sulfate's global market is limited but stable, primarily driven by generic sales in cost-sensitive regions.
  • The drug faces intense competition from newer antihypertensives with better safety and convenience profiles.
  • Patent expirations and biosimilar entry contribute to declining margins and price erosion.
  • Opportunities exist through developing combination therapies, expanding indications, and targeting emerging markets.
  • Long-term growth prospects hinge on strategic innovation and market diversification to offset declining demand in developed regions.

FAQs

1. Is guanadrel sulfate still widely used in clinical practice?
While its use has declined in developed countries due to newer therapies, guanadrel sulfate remains relevant in select regions where cost considerations and healthcare access limit options.

2. Are there ongoing efforts to reformulate or reposition guanadrel sulfate?
Currently, there are limited initiatives. However, potential exists in developing fixed-dose combinations or exploring new indications to extend its lifecycle.

3. How does the patent landscape affect guanadrel sulfate sales?
Patent expirations have led to an influx of generics, increasing competition and reducing profit margins but maintaining steady access in price-sensitive markets.

4. What are the primary challenges facing the growth of guanadrel sulfate?
Main challenges include competition from newer antihypertensives, safety profile concerns, and regulatory hurdles impacting clinical adoption.

5. Can emerging markets support future growth for guanadrel sulfate?
Yes, as these markets often favor affordable, older medications, strategic expansion and localized partnerships could foster incremental growth.

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