Last Updated: June 17, 2026

CARDIOQUIN Drug Patent Profile


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

Cardioquin is a drug marketed by Pharm Res Assoc and is included in one NDA.

The generic ingredient in CARDIOQUIN is quinidine polygalacturonate. There are twenty-seven drug master file entries for this compound. Additional details are available on the quinidine polygalacturonate profile page.

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

US Patents and Regulatory Information for CARDIOQUIN

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Pharm Res Assoc CARDIOQUIN quinidine polygalacturonate TABLET;ORAL 011642-002 Approved Prior to Jan 1, 1982 DISCN No 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
Last updated: February 13, 2026

What is the market outlook for Cardioquin?

Cardioquin (generic quinidine) is an anti-arrhythmic drug that has been used to treat atrial and ventricular arrhythmias. The market for anti-arrhythmic drugs remains substantial due to the high prevalence of cardiovascular diseases globally. The global anti-arrhythmic drugs market was valued at approximately $2.9 billion in 2022 and is forecasted to reach $4.2 billion by 2028, growing at a compound annual growth rate (CAGR) of 6.3% [1].

Cardioquin’s positioning is primarily within hospital and specialty settings. Its market share is limited by the availability of newer drugs with better safety profiles but retains importance due to its efficacy and low-cost profile in specific patient segments. The drug's cardiovascular indications are stable, with ongoing demand from established therapeutic protocols.

What are the core patent and regulatory considerations?

Cardioquin’s patent landscape is dominated by the original patent expiration (generally around mid-2000s for quinidine). Since then, generic versions have saturated markets globally. Current regulatory frameworks in major markets (US, EU, Japan) support generic integration, reducing exclusivity options for branded versions.

  • FDA: Approved since the 1970s for use as an anti-arrhythmic, with no new indications approved recently.
  • European Medicines Agency (EMA): Similar approval status with generic versions available.
  • Orphan designation or exclusivity protections are unlikely for common arrhythmic treatments, limiting new patent opportunities.

Regulatory hurdles are minimal but focus on ensuring bioequivalence for generics and safety compliance, which tend to have low barriers given the long-established use of quinidine.

What is the competitive landscape?

The competitive environment is characterized by multiple generic manufacturers, primarily in India, China, and Europe. Key players include Teva, Mylan, and Sandoz, which market quinidine and similar anti-arrhythmics.

Market differentiation hinges on:

  • Price competition: Generics are priced 40-70% lower than branded versions.
  • Formulation innovations: Limited due to drug’s age but potential exists in remanufacturing processes.
  • Distribution channels: Dominated by hospital formularies and government procurement.

The emergence of newer drugs like amiodarone, dronedarone, and sotalol, with improved safety profiles, constrains growth unless Cardioquin is positioned for niche or low-cost markets.

What are the key development and investment considerations?

For potential R&D or investment, consider the following:

  • Market stability: The drug retains demand in developed countries as a second-line or cost-effective option.
  • Growth potential: Limited unless reformulation, combination therapies, or new indications are pursued.
  • Pipeline opportunities: No significant ongoing clinical trials or new formulations announced.
  • Regulatory risk: Minimal for generics; higher for novel formulations or indications.
  • Pricing dynamics: Pressure from generic competition reduces margins, with potential for volume-based growth.

An investment focusing on generic manufacturing could benefit from high-volume sales in emerging markets, where healthcare infrastructure and affordability drive drug consumption.

What does the financial outlook look like?

Existing market share and demand suggest steady revenue streams for producers of Cardioquin. Given the competitive landscape, profit margins align with typical generic drugs (10-15%). Cost control and efficient distribution are critical.

Potential for revenue growth exists mainly through:

  • Increasing market penetration in less developed countries.
  • Expansion into orphan or niche indications if supported by clinical data.
  • Licensing or partnership arrangements for distribution.

Research and development investments for reformulation or new indications are unlikely to yield short-term returns without substantial innovation.

What are the key risks?

  • Market decline due to substitution by newer drugs.
  • Regulatory shifts favoring novel therapies.
  • Price erosion driven by generic competition.
  • Limited opportunity for patent extensions or exclusivity.

Key Takeaways

  • Cardioquin operates in a mature, competitive market with stable demand driven by existing cardiovascular treatments.
  • Most revenue stems from generic sales, with limited prospects for patent or proprietary advantage.
  • Growth derives from geographic expansion rather than product innovation.
  • Margins are under pressure; cost efficiency and volume are critical for profitability.
  • Investment strategies should focus on generics in emerging markets with high cardiovascular disease prevalence.

FAQs

Q1: Are there opportunities for patent extension or new formulations?
A1: No, as quinidine's patent expired decades ago; reformulation prospects are limited unless paired with novel delivery methods or indications.

Q2: Can Cardioquin be positioned for new indications?
A2: Unlikely without significant clinical trials; current data supports only anti-arrhythmic use.

Q3: Which markets offer the greatest growth potential?
A3: Emerging markets like India and Southeast Asia, where affordability and cardiovascular disease prevalence support volume growth.

Q4: How does Cardioquin compare to newer anti-arrhythmics?
A4: It is less safe and less tolerable but remains cost-effective and effective for certain patient segments.

Q5: What regulatory hurdles exist?
A5: Minimal for generics; no recent substantial barriers besides compliance with safety and bioequivalence standards.


Sources:

[1] MarketsandMarkets, "Anti-Arrhythmic Drugs Market," 2022.

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