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Last Updated: March 19, 2026

ZYLOPRIM Drug Patent Profile


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

Zyloprim is a drug marketed by Casper Pharma Llc and is included in one NDA.

The generic ingredient in ZYLOPRIM is allopurinol. There are twenty-two drug master file entries for this compound. Forty-one suppliers are listed for this compound. Additional details are available on the allopurinol profile page.

DrugPatentWatch® Litigation and Generic Entry Outlook for Zyloprim

A generic version of ZYLOPRIM was approved as allopurinol by WATSON LABS on September 28th, 1984.

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Summary for ZYLOPRIM
US Patents:0
Applicants:1
NDAs:1

US Patents and Regulatory Information for ZYLOPRIM

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Casper Pharma Llc ZYLOPRIM allopurinol TABLET;ORAL 016084-001 Approved Prior to Jan 1, 1982 AB RX Yes No ⤷  Get Started Free ⤷  Get Started Free ⤷  Get Started Free
Casper Pharma Llc ZYLOPRIM allopurinol TABLET;ORAL 016084-003 Aug 4, 2022 AB RX Yes No ⤷  Get Started Free ⤷  Get Started Free ⤷  Get Started Free
Casper Pharma Llc ZYLOPRIM allopurinol TABLET;ORAL 016084-002 Approved Prior to Jan 1, 1982 AB RX Yes 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

ZYLOPRIM (Allopurinol): Investment Scenario, Market Dynamics, and Financial Trajectory

Last updated: February 3, 2026


Summary

ZYLOPRIM (allopurinol) is a longstanding prescription medication used primarily for gout management and hyperuricemia associated with cancer therapies. This analysis explores the current investment landscape, market trends, competitive dynamics, and projected financial trajectory for ZYLOPRIM. Despite patent expirations and competition from novel therapies, ZYLOPRIM maintains a critical position in gout treatment, supported by high prescription volumes, established clinical efficacy, and favorable manufacturing profiles. Future growth prospects hinge on patent status, generic market penetration, and potential novel formulations or indications.


1. Investment Scenario Overview

Parameter Details
Market Position Established, with a leading share in gout management; off-patent globally.
Patent Status Patents have expired or are nearing expiration, leading to increased generic competition.
Manufacturers & Licenses Multiple generic manufacturers globally; original patent holder (Sanofi or its predecessors) exited the market.
Market Entry Barriers Low, due to generic availability and established prescribing habits.
Revenue Streams Primarily driven by volume sales; limited scope for premium prices.
Investment Risks Market saturation, generic price erosion, potential for new technologies (e.g., novel urate-lowering agents).

2. Market Dynamics

a. Global Market Size & Growth

Region Market Size (2023) CAGR (2023-2030) Notes
North America ~$900 million 2-3% Dominant due to high gout prevalence and established guidelines.
Europe ~$600 million 2-3% Similar market conditions as North America.
Asia-Pacific ~$400 million 5-7% Growing due to increasing gout incidence, rising healthcare infrastructure, and affordability.
Rest of World ~$200 million 4-6% Emerging markets with expanding access and guidelines adoption.

Source: GlobalData, 2023.

b. Competitive Landscape

Key Players Market Share (2023) Strategy Notes
Generic Manufacturers 60-70% Price competition; broad access Multiple companies compete on price; lower margins.
Original Innovator <10% Niche branding; clinical preference Limited due to patent expiration.
Emerging Alternatives 5-10% Duzallo (lesinurad + allopurinol), Febuxostat Slightly newer options with differing safety profiles.

Table 1: Key Competitive Factors

Factor Impact on Investment
Price erosion High, pressure on margins for manufacturers.
Patent cliffs Significant; opens markets for generics.
Regulatory environment Strict in some markets but generally supportive of generics.
Product differentiation Minimal; mainly based on price competitiveness and supply reliability.

c. Pricing & Reimbursement Trends

  • Average Wholesale Price (AWP): $0.50 – $1.50 per pill (varies by formulation and region).
  • Reimbursement Policies: Favor generic substitution; reimbursement is standard where prescribed.
  • Pricing Pressure: Significant due to multiple generic options leading to declining unit prices.

3. Financial Trajectory: Forecast and Projections

a. Revenue Projections (2023-2030)

Year Global Revenue (USD Millions) Comments
2023 ~$1.5 billion Base year; mature market with high volumes.
2025 ~$1.2 billion Price erosion and increasing generic competition.
2027 ~$900 million Market saturation; growth plateauing.
2030 ~$700 million Continued decline; potential stabilizing from emerging markets.

Assumption: CAGR of approximately -5% post-2023.

b. Key Revenue Drivers

  • Volume Growth: Slight increase driven by rising gout prevalence in emerging markets.
  • Price Decline: Significant, especially in mature markets.
  • Generic Market Share: Approaching near-total dominance, limiting pricing power.

c. Cost Structures & Profitability

Cost Element Estimates Implication
Manufacturing Cost per Unit ~$0.10 – $0.20 Low, due to generic manufacturing efficiencies.
R&D Investment Minimal for legacy formulations Limited, mainly regulatory and supply chain costs.
Marketing & Distribution Moderate Focused on maintaining supply chain and provider relationships.

4. Market Trends & Future Outlook

Trend Impact on ZYLOPRIM Source
Increased use of biologics and novel urate-lowering drugs (e.g., pegloticase, lesinurad) May limit market growth [2]
Rising gout prevalence linked to aging populations and obesity Supports long-term volume [3]
Enhanced access to generics in emerging economies Expanding volume but downward pricing [4]
Development of combination therapies Could marginally affect standalone allopurinol sales [5]

Overall, ZYLOPRIM’s market is mature, with growth primarily driven by increased disease prevalence rather than innovation.


5. Comparative Analysis with Off-Patent & Newer Therapies

Therapy Type Market Share Price Point Efficacy & Safety Profile Patent Status
Allopurinol (ZYLOPRIM) >60% Low Proven, well-understood Off-patent
Febuxostat (Uloric) 10-15% Higher Similar efficacy; concern over cardiovascular risks Patented, patent expiry in key markets
Lesinurad + Allopurinol (Duzallo) <5% Premium Promising but limited adoption Patents filed/expiring
Pegloticase Niche (1-2%) Very high Reserved for refractory gout Patent protected

6. Policy & Regulatory Environment

  • FDA & EMA: Generally supportive of generic manufacturing; expedited review pathways for approved generics.
  • Pricing Regulations: Focused on controlling costs; increased negotiations in some countries.
  • Patent Litigation: Limited for off-patent drugs; very minimal current legal barriers affecting ZYLOPRIM.

7. Opportunities & Challenges

Opportunities Challenges
Entry into burgeoning markets (e.g., India, Southeast Asia) Price competition reduces margins
Developing fixed-dose combinations Limited innovation; mostly incremental
Potential pipeline off-label uses Regulatory hurdles and uncertain demand

8. Key Takeaways

  • Mature Market: ZYLOPRIM’s core market is saturated with generic competition; revenue decline trends are evident.
  • Market Dynamics: Price erosion, near-universal generic adoption, and the emergence of alternative therapies continue to pressure margins.
  • Growth Potential: Limited; growth hinges on expanding into emerging markets with increasing gout prevalence, offset by declining prices.
  • Investment Considerations: Long-term profitability declines as patent protections lapse; investors should focus on supply chain stability, global distribution, and emerging market penetration.
  • Strategic Outlook: Diversification into combination therapies or novel indications remains unlikely; focus on sustaining volume and low-cost manufacturing.

FAQs

Q1: Will ZYLOPRIM regain market share against newer urate-lowering therapies?
No. The market trend favors newer agents with better safety profiles, and ZYLOPRIM's off-patent status limits its ability to differentiate.

Q2: How significant is the impact of generic competition on ZYLOPRIM’s revenue?
Very significant; generic penetration accounts for over 90% of prescriptions in mature markets, leading to steep price declines.

Q3: Are there potential new indications that could extend ZYLOPRIM’s market relevance?
Limited. Currently, off-label uses are anecdotal; the primary indications remain gout and hyperuricemia management.

Q4: How are emerging markets influencing ZYLOPRIM’s future?
Growing gout prevalence and lower regulatory barriers foster increased volume, partially offsetting unit price declines.

Q5: What strategies could manufacturers pursue to sustain profitability?
Focusing on manufacturing efficiencies, supply chain optimization, expanding into underserved geographies, and exploring combination therapies.


References

[1] GlobalData. (2023). Gout Treatment Market Report.
[2] U.S. Food & Drug Administration. (2022). New Drug Approvals & Pipeline.
[3] Kuo, C.-F., et al. (2015). Global gout prevalence: systematic review. Rheumatology.
[4] WHO. (2021). Access to medicines in low-income countries.
[5] Johnson, S. R., et al. (2017). Emerging combination therapies for gout. Clin Rheumatol.


Conclusion:
The investment outlook for ZYLOPRIM is characterized by a mature, highly competitive market with declining revenues driven by patent expiry and generic proliferation. While the drug remains a foundational treatment for gout, growth prospects are limited, and future profitability depends on geographic expansion and supply chain efficiencies rather than innovation. Investors should assess long-term decline trajectories and competitive pressures when considering exposure to ZYLOPRIM-related assets.

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