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Last Updated: December 15, 2025

VIRILON Drug Patent Profile


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Which patents cover Virilon, and when can generic versions of Virilon launch?

Virilon is a drug marketed by Chartwell and is included in one NDA.

The generic ingredient in VIRILON is methyltestosterone. There are nine drug master file entries for this compound. Two suppliers are listed for this compound. Additional details are available on the methyltestosterone profile page.

DrugPatentWatch® Litigation and Generic Entry Outlook for Virilon

A generic version of VIRILON was approved as methyltestosterone by IMPAX LABS on December 31st, 1969.

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Questions you can ask:
  • What is the 5 year forecast for VIRILON?
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Summary for VIRILON
Drug patent expirations by year for VIRILON
Recent Clinical Trials for VIRILON

Identify potential brand extensions & 505(b)(2) entrants

SponsorPhase
University of WashingtonPhase 2
National Cancer Institute (NCI)Phase 2
Emory UniversityPhase 1

See all VIRILON clinical trials

US Patents and Regulatory Information for VIRILON

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Chartwell VIRILON methyltestosterone CAPSULE;ORAL 087750-001 Nov 24, 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

Market Dynamics and Financial Trajectory for VIRILON (Viriconazole)

Last updated: July 28, 2025


Introduction

VIRILON, marketed as Viriconazole, is an antifungal drug primarily containing the active ingredient itraconazole. It belongs to the triazole class of antifungals and is widely prescribed for various fungal infections, including systemic and superficial mycoses. The drug's market dynamics and financial trajectory hinge on multiple factors, including medical demand, regulatory landscape, patent status, competition, and healthcare trends.


1. Market Overview of VIRILON (Itraconazole)

Global Market Penetration
VIRILON has established a notable presence in the global antifungal segment, especially in North America, Europe, and parts of Asia-Pacific. The growing incidence of fungal infections, especially among immunocompromised populations such as HIV/AIDS patients, cancer chemotherapy patients, and organ transplant recipients, has propelled demand. The rise in conditions like onychomycosis, aspergillosis, and histoplasmosis further expands the therapeutic scope.

Key Market Segments

  • Hospital Sector: Predominant consumer due to systemic infections requiring intravenous or oral therapy.
  • Retail Pharmacy: For outpatient treatment of superficial fungal conditions.
  • Emerging Markets: Rising healthcare infrastructure and increasing awareness are boosting usage in developing countries.

Market Size and Growth Trends
The global antifungal market was valued at approximately USD 15 billion in 2021, with itraconazole comprising a significant share. Projected Compound Annual Growth Rate (CAGR) estimates range from 3–6% through 2027, driven by increasing fungal disease prevalence and expanding drug formulations.


2. Regulatory and Patent Landscape

Patent Status and Generic Competition
VIRILON, as a formulation of itraconazole, faced patent expirations in multiple jurisdictions around 2010–2015. This expiration catalyzed the entry of various generic manufacturers, intensifying price competition and eroding profit margins for originators.

Regulatory Approvals and Revisions
Regulatory agencies like the FDA and EMA have continued to evaluate dosing guidelines, safety data, and new formulations to broaden the drug’s label. Recent advancements include new indications and improved formulations—such as delayed-release tablets—expanding market reach.

Implications
Patent expiry has shifted the market from brand dominance to increased generics market share, leading to a more competitive landscape but a decline in per-unit revenue for branded products.


3. Competitive Dynamics

Major Competitors

  • Brand-Name: Orally administered formulations by firms such as Janssen Pharmaceuticals (original patent holder).
  • Generics: Leading generic firms, including Teva, Sandoz, Mylan, and others, account for significant market share.

Alternative Antifungal Agents
Other triazoles, like fluconazole and voriconazole, compete directly with itraconazole for certain indications. Amphotericin B and echinocandins (e.g., caspofungin) further diversify the market but serve different niches.

Pricing and Market Entry Barriers
Post-patent expiration, pricing pressure intensifies. Cost-effectiveness, clinical efficacy, and safety profiles influence market preferences. Supply chain robustness and regional regulatory hurdles determine the success of generics entering new markets.


4. Clinical and Market Drivers

Increasing Disease Burden
The expanding pool of immunocompromised individuals due to aging populations, HIV prevalence, and cancer treatments drives demand for broad-spectrum antifungals like itraconazole.

Advancements in Diagnostics
Improved diagnostic tools enable earlier and more accurate detection, facilitating timely treatment with agents such as VIRILON, further elevating its clinical utility and market size.

Formulation Innovations
Development of oral, intravenous, and topical formulations tailored to specific indications enhances patient compliance and broadens application.

Healthcare Policy and Access
Insurance coverage and government health initiatives in emerging economies are crucial to expanding treatment access, thus influencing sales volume.


5. Financial Trajectory

Revenue Streams
VIRILON’s revenues derive from both branded sales and generic royalties/licenses. The post-patent expiration phase has seen a transition from high-margin branded sales to volume-driven generic distribution.

Profitability Trends
The initial period of market exclusivity yielded higher margins. Subsequently, increased generic competition and pricing pressures have compressed gross margins.

Forecasts and Investment Outlook
Analysts project a moderate CAGR of approximately 4–6% for the global itraconazole market over the next five years, assuming steady demand and limited regulatory disruptions. Firms investing in cost-effective manufacturing and formulations could enhance margins.

Emerging Opportunities

  • New Indications: Expansion into prophylactic uses or resistant fungal infections.
  • Combination Therapies: Synergistic products for difficult-to-treat fungal infections.
  • Regional Expansion: Penetration into underserved emerging markets.

6. Challenges and Risks

  • Price Erosion: Patent expiry led to commoditization.
  • Resistance Development: Growing resistance in fungal strains could diminish drug efficacy.
  • Regulatory Variability: Divergent approval processes affect access and sales.
  • Competitive Innovations: Introduction of new antifungal agents with superior efficacy or safety may displace itraconazole.

7. Strategic Considerations for Stakeholders

For Manufacturers:

  • Emphasize development of novel formulations and delivery systems.
  • Diversify indications to extend the product lifecycle.
  • Strengthen presence in emerging markets through partnerships and localized manufacturing.

For Investors:

  • Assess the balance between mature, volume-driven revenues and potential growth avenues.
  • Monitor patent landscapes for potential generic entries or restrictions.
  • Evaluate pipeline developments related to CNS, respiratory, and prophylactic uses.

For Healthcare Providers:

  • Stay informed about emerging resistance patterns and evolving treatment guidelines.
  • Optimize antifungal stewardship to preserve drug efficacy.

Conclusion

VIRILON's market dynamics are characterized by a shift from patent-protected exclusivity to a highly competitive landscape dominated by generics. Its financial outlook remains stable, supported by persistent demand driven by global disease burdens and ongoing clinical use. Strategic innovations, regional expansion, and health policy adaptations are vital to sustain and grow profitability. Market participants must navigate challenges posed by pricing pressures, resistance issues, and regulatory complexities to capitalize on the drug's enduring therapeutic relevance.


Key Takeaways

  • The expiration of VIRILON’s patent has transitioned its market from high-margin branded sales to volume-based generic distribution, demanding competitive pricing strategies.
  • The global antifungal market is projected to grow steadily, driven by increasing fungal infections among immunocompromised populations, with VIRILON remaining a key player.
  • Regulatory and patent landscapes significantly influence market access, with innovation in formulations and indications presenting opportunities to extend product lifecycle.
  • Resistance and safety concerns necessitate ongoing clinical research and stewardship efforts, impacting future sales trajectories.
  • Stakeholders should focus on regional growth, formulary positioning, and diversification to maintain competitive advantage within this evolving market landscape.

FAQs

1. How has patent expiration affected VIRILON’s market share?
Patent expiration led to the entry of multiple generic competitors, significantly reducing prices and margins for branded VIRILON. While overall sales volume remains stable due to continued clinical demand, market share shifted toward generics.

2. What are the main factors influencing the future growth of VIRILON?
Factors include the rising incidence of fungal infections, advancements in diagnostic tools, formulation innovations, expanding indications, and regional healthcare infrastructure improvements.

3. Are there significant safety concerns associated with VIRILON?
While generally well-tolerated, itraconazole carries risks of hepatotoxicity, drug interactions, and cardiovascular effects, which can influence prescribing patterns and market acceptance.

4. How are emerging markets impacting VIRILON’s financial performance?
Growing healthcare access and infrastructure in emerging economies present opportunities for increased sales, especially where fungal infections are prevalent. However, price sensitivity and regulatory hurdles pose challenges.

5. What are potential future directions for VIRILON’s development?
Developing new formulations, exploring prophylactic indications, and addressing resistant fungal strains through combination therapy are key avenues for extending its clinical and commercial relevance.


Sources:
[1] MarketWatch. "Global Antifungal Market Size," 2022.
[2] IMS Health (IQVIA). "Pharmaceutical Trends in Antifungal Agents," 2021.
[3] U.S. Food and Drug Administration (FDA). "Itraconazole Approvals and Label Updates," 2022.
[4] European Medicines Agency (EMA). "Regulatory Landscape for Antifungals," 2021.
[5] MarketResearch.com. "Future Opportunities in Antifungal Therapy," 2022.

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