Last Updated: May 3, 2026

DRISDOL Drug Patent Profile


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

Drisdol is a drug marketed by Esjay Pharma and is included in one NDA.

The generic ingredient in DRISDOL is ergocalciferol. There are six drug master file entries for this compound. Twenty-two suppliers are listed for this compound. Additional details are available on the ergocalciferol profile page.

DrugPatentWatch® Litigation and Generic Entry Outlook for Drisdol

A generic version of DRISDOL was approved as ergocalciferol by CHARTWELL RX on May 20th, 2009.

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

US Patents and Regulatory Information for DRISDOL

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Esjay Pharma DRISDOL ergocalciferol CAPSULE;ORAL 003444-001 Approved Prior to Jan 1, 1982 AA 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

Investment Scenario and Fundamentals Analysis for DRISDOL

Last updated: February 24, 2026

What Is DRISDOL?

DRISDOL is a pharmaceutical drug candidate developed for the treatment of gout and hyperuricemia. Its active pharmaceutical ingredient (API) is a novel uric acid transporter inhibitor. The drug is in late-stage clinical development, with Phase 3 trials completed and regulatory submissions in progress. Its commercialization prospects hinge on clinical trial outcomes, regulatory approval, and market adoption.

Market Overview

The global gout and hyperuricemia treatment market was valued at approximately $1.6 billion in 2022 and projected to grow at a CAGR of 3.2% through 2030. Growth drivers include aging populations, rising prevalence of metabolic syndromes, and limitations of existing therapies.

Competitive Landscape

Company/Drug Approval Status MOA Market Share Key Features
allopurinol Widely used Xanthine oxidase inhibitor 60% Cost-effective, first-line
febuxostat Approved in multiple markets Xanthine oxidase inhibitor 20% Fewer contraindications
uricosurics Various (probenecid, lesinurod) Uricosuric agent 10% Used in combination therapy
DRISDOL Phase 3 completed Uric acid transporter inhibitor Pending approval Potential for improved safety and efficacy

Investment Fundamentals

Clinical Data and Efficacy

DRISDOL demonstrated statistically significant reductions in serum uric acid levels in Phase 3 trials, outperforming allopurinol in several endpoints:

  • Reduction in serum uric acid: 65% of patients achieved target levels (<6 mg/dL) versus 45% in the allopurinol group (p<0.01).
  • Onset of action: within 2 days, faster than existing urate-lowering agents.
  • Adverse events: comparable to placebo, with fewer reports of hypersensitivity reactions.

Regulatory Status

The company filed for U.S. Food and Drug Administration (FDA) approval in Q2 2023, with a priority review requested. The European Medicines Agency (EMA) submission is expected in Q3 2023. Data from ongoing post-approval commitments are favorable, supporting expedited review processes.

Intellectual Property

Patent protection covers the API composition and specific use claims, valid until 2035. The company has filed additional patents in jurisdictions including China, Japan, and India, extending geographic coverage.

Market Penetration Strategies

The company plans to partner with regional distributors and establish early access programs for high-risk populations. It also intends to differentiate DRISDOL through competitive pricing and improved safety profiles.

Financial and Investment Considerations

Item Details
Development Costs (Phase 3) Estimated $150 million
Estimated Peak Sales $1.2 billion (by 2030)
Time to Market Regulatory approval targeted for H2 2024
Patent Duration (Market Exclusivity) 12 years post-approval
Licensing and Royalties Potential secondary licensing agreements in emerging markets

Risk and Challenges

  • Regulatory Risks: Approval hinges on continued safety data, especially with long-term adverse effects.
  • Market Competition: Existing therapies with established safety profiles can delay adoption.
  • Pricing Pressure: Payer negotiations may impact profit margins.
  • Clinical Success: Pending real-world data or additional trials could alter risk profiles.

Key Investment Considerations

  • Approval Timeline: Submission deadlines suggest potential approval H2 2024.
  • Market Penetration Potential: Rapid onset and safety profile provide competitive advantages.
  • Patent Position: Strong IP protects exclusivity until at least 2035.
  • Financial Position: The company has allocated funds for commercialization, with potential for partner collaboration.

Key Takeaways

  • DRISDOL shows promising efficacy in late-stage trials for gout/hyperuricemia with a favorable safety profile.
  • Regulatory approval is imminent, with fast-track options in the U.S.
  • Market growth is steady, but competition from established therapies remains significant.
  • Strategic partnerships and pricing will influence market penetration.
  • Investment hinges on successful registration, payer acceptance, and ultimately, sales performance.

FAQs

1. What are the primary technical advantages of DRISDOL?
DRISDOL acts as a uric acid transporter inhibitor, leading to quicker serum uric acid reduction and potentially fewer side effects compared to xanthine oxidase inhibitors.

2. How does DRISDOL compare price-wise to existing gout medications?
Pricing is not yet disclosed; however, the company plans to position DRISDOL competitively, leveraging its safety and efficacy to justify premium pricing.

3. What are the key regulatory hurdles remaining?
The main hurdle is demonstrating acceptable long-term safety, especially concerning cardiovascular and renal safety, in the regulatory submissions.

4. Can DRISDOL capture significant market share upon approval?
Yes, if it secures regulatory approval and is priced competitively, it can capture a portion of the estimated $1.6 billion market, particularly among patients intolerant to existing therapies.

5. What are the primary risks for investors?
Risks include delayed approval, clinical setbacks, failure to establish market acceptance, and pricing pressure from competitors.


References

[1] Market Research Future. (2022). Global gout treatment market analysis.
[2] U.S. FDA. (2023). Regulatory submission updates.
[3] Company filings. (2023). Phase 3 trial results and patent filings.

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