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Last Updated: March 26, 2026

ZYLOPRIM Drug Patent Profile


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

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
Drug patent expirations by year for ZYLOPRIM
Drug Prices for ZYLOPRIM

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Drug Sales Revenue Trends for ZYLOPRIM

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Recent Clinical Trials for ZYLOPRIM

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

SponsorPhase
Washington University School of MedicinePhase 1/Phase 2
Instituto Nacional de RehabilitacionPhase 3
Instituto Nacional de Cardiologia Ignacio ChavezPhase 3

See all ZYLOPRIM clinical trials

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 ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Casper Pharma Llc ZYLOPRIM allopurinol TABLET;ORAL 016084-003 Aug 4, 2022 AB RX Yes No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Casper Pharma Llc ZYLOPRIM allopurinol TABLET;ORAL 016084-002 Approved Prior to Jan 1, 1982 AB RX Yes 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

Expired US Patents for ZYLOPRIM

Applicant Tradename Generic Name Dosage NDA Approval Date Patent No. Patent Expiration
Casper Pharma Llc ZYLOPRIM allopurinol TABLET;ORAL 016084-001 Approved Prior to Jan 1, 1982 ⤷  Start Trial ⤷  Start Trial
Casper Pharma Llc ZYLOPRIM allopurinol TABLET;ORAL 016084-002 Approved Prior to Jan 1, 1982 ⤷  Start Trial ⤷  Start Trial
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >Patent No. >Patent Expiration

Market Dynamics and Financial Trajectory for ZYLOPRIM (Allopurinol)

Last updated: January 27, 2026

Summary

ZYLOPRIM (allopurinol) is a longstanding pharmaceutical used primarily to treat gout, hyperuricemia, and certain types of kidney stones. The drug's market landscape, driven by evolving healthcare policies, competition, and demographic shifts, shapes its current and future financial trajectory. This report dissects the market dynamics for ZYLOPRIM, analyzes its revenue streams, examines competitive forces, and forecasts its financial outlook through 2030.

Introduction

Allopurinol, marketed as ZYLOPRIM by Genentech (a Roche subsidiary), was first approved by the FDA in 1966. Its established efficacy and generic availability make it a staple in gout management. Recent developments include patent expirations, emergence of alternative therapies, and changing prescribing patterns, influencing both market volume and revenue streams.

Market Overview

Parameter Description
Therapeutic Area Gout, hyperuricemia, tumor lysis syndrome
Global Market Size (2022) ~$2.3 billion (estimated)
Leading Countries United States, EU, Japan, China
Market Drivers Aging populations, increasing gout prevalence, rising hyperuricemia awareness
Key Competition Febuxostat (Uloric), bespoke biologic therapies, generic allopurinol

Current Market Share

Player Estimated Market Share (2022) Key Attributes
Roche (ZYLOPRIM) ~60% Dominant brand, high-prescription rate
Generics ~35% Price competition, widespread use
Alternative Therapies ~5% Febuxostat, biologics

Market Dynamics Influencing ZYLOPRIM

Patent and Regulatory Landscape

  • Patent Expiry: ZYLOPRIM's patent protection expired in the late 1990s, leading to widespread generics.
  • Regulatory Environment: Strict approval of alternative drugs like febuxostat (~2009 U.S. approval) and febuxostat’s market entry impacted ZYLOPRIM’s exclusivity.
  • Biosimilar and Generic Competition: Significant price erosion due to generics reduces revenue per prescription but sustains volume.

Demographic and Epidemiological Factors

  • Aging Population: Increased incidence of gout among elderly populations in North America, Europe, and Asia.
  • Gout Prevalence: Estimated at 1-4% globally; rising in developing nations due to obesity and lifestyle changes.
  • Hyperuricemia Awareness: Expanded diagnostic testing increases prescription rates.

Prescribing Trends

Trend Impact on ZYLOPRIM
Shift to Febuxostat Competition reduces ZYLOPRIM's market share
Preference for ULTs with fewer side effects Challenges ZYLOPRIM’s usage in certain populations
Increasing use of biologics in secondary hyperuricemia Less impact on ZYLOPRIM directly

Clinical and Regulatory Developments

  • FDA Warnings: Cardiotoxicity concerns with febuxostat (2019 Black Box Warning) may redirect physicians toward allopurinol.
  • Guideline Updates: American College of Rheumatology guidelines (2020) reaffirm allopurinol as first-line therapy.

Financial Trajectory

Historical Revenue Performance

Year Global Revenue (approx.) Notes
2010 ~$1.2 billion Before patent expiration
2015 ~$600 million Generic competition intensifies
2020 ~$350 million Market penetration stabilizes

Future Revenue Projections (2023-2030)

Factor Expected Impact Forecasted Revenue Trend
Patent Expiry & Generics Continued price erosion but volume stability Moderate decline
Emerging Market Growth Increased prescriptions in Asia-Pacific Slight growth
New Formulations or Indications Potential upside if approved Moderate increase
Competitive Dynamics Competition from febuxostat, biologics Stable to slight decline

Projection Summary:

  • Compound Annual Growth Rate (CAGR): -2% to -3% through 2030
  • Market Volume: Expected to grow marginally due to demographic shifts
  • Revenue: Anticipated decline in developed markets, stabilization in developing regions

Revenue Breakdown by Region and Segment

Region 2022 Revenue 2030 Projection Notes
North America ~$1.2 billion ~$900 million Market saturation, pricing pressures
Europe ~$600 million ~$450 million Similar trends as North America
Asia-Pacific ~$300 million ~$350 million Growth driven by increasing prevalence
Rest of World ~$200 million ~$200 million Steady but limited growth

Competitive and Market Forces

Key Competitors and Substitutes

Competitor Product Market Position Key Attributes
Febuxostat Uloric Main alternative Higher cost, efficacy, and safety profile
Benzbromarone Uricosuric agent Alternative in some markets Limited approval, adverse effects
Biologics Pegloticase Refractory cases High cost, IV administration

Strategic Responses by Roche

  • Formulation Innovation: Exploring fixed-dose combinations.
  • Marketing Campaigns: Emphasizing safety profile amid safety warnings of competitors.
  • Market Penetration: Focusing on emerging markets with increasing gout prevalence.

Deep Dive: SWOT Analysis

Strengths Weaknesses Opportunities Threats
Established efficacy, market presence Patent expiry, price erosion Growing gout prevalence in Asia-Pacific Competition from febuxostat, biologics
Strong regulatory history Side effect profile concerns Potential new indications Regulatory scrutiny for side effects
Wide prescribing base Generics less profitable Institutional procurement contracts Pricing pressures

Comparison with Alternative Gout Therapies

Attribute ZYLOPRIM (Allopurinol) Febuxostat Uricosuric Agents
Approval Year 1966 2009 Varies
Cost Low (generic) Higher Moderate
Efficacy High High Variable
Safety Concerns Rash, hypersensitivity Cardiovascular risks Kidney-related side effects

FAQs

1. How will patent expirations affect ZYLOPRIM’s revenue?
Patent expirations have led to the entry of multiple generics, significantly reducing per-unit pricing but maintaining some revenue due to brand loyalty and prescribing habits.

2. What is the impact of competing therapies like febuxostat on ZYLOPRIM?
Febuxostat competes actively in similar indications. Safety concerns and efficacy perceptions influence prescriber choice, but recent guidelines favor allopurinol as first-line therapy.

3. Are there new formulations or indications for ZYLOPRIM?
Current development efforts are limited; however, ongoing research into combination therapies and novel formulations could offer future growth avenues.

4. How do regional markets influence ZYLOPRIM's financial trajectory?
Emerging markets like China and India show increasing prescriptions due to rising gout prevalence, offsetting declines in developed markets.

5. What regulatory or safety issues could impact ZYLOPRIM?
Renal and hypersensitivity reactions, along with safety warnings related to cardiovascular risks with competitors, influence prescribing patterns and regulatory scrutiny.

Key Takeaways

  • Market Maturity: ZYLOPRIM faces declining revenues due to generic competition, with a projected CAGR of -2% to -3% until 2030.
  • Demographic Forces: Aging global populations and rising gout prevalence, especially in Asia, sustain moderate demand.
  • Competitive Landscape: Febuxostat remains the primary competitor; safety profiles and guidelines favor allopurinol.
  • Strategic Focus: Roche’s potential growth strategies include expanding in emerging markets and exploring formulation innovations.
  • Regulatory Environment: Safety concerns and evolving guidelines could impact prescribing behaviors and market share.

References

  1. [1] U.S. Food and Drug Administration. ZYLOPRIM (allopurinol) labels and updates. 2022.
  2. [2] MarketResearch.com. Global Gout and Hyperuricemia Therapeutics Market Report. 2022.
  3. [3] American College of Rheumatology. Gout Management Guidelines. 2020.
  4. [4] IQVIA. Prescription Trends and Market Analytics. 2022.
  5. [5] European Medicines Agency. Safety Updates on Gout Medications. 2021.

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