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Last Updated: March 19, 2026

CHLOROTHIAZIDE W/ RESERPINE Drug Patent Profile


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Which patents cover Chlorothiazide W/ Reserpine, and what generic alternatives are available?

Chlorothiazide W/ Reserpine is a drug marketed by Watson Labs and is included in two NDAs.

The generic ingredient in CHLOROTHIAZIDE W/ RESERPINE is chlorothiazide; reserpine. There are forty-two drug master file entries for this compound. Additional details are available on the chlorothiazide; reserpine profile page.

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Summary for CHLOROTHIAZIDE W/ RESERPINE
US Patents:0
Applicants:1
NDAs:2

US Patents and Regulatory Information for CHLOROTHIAZIDE W/ RESERPINE

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Watson Labs CHLOROTHIAZIDE W/ RESERPINE chlorothiazide; reserpine TABLET;ORAL 084853-001 Approved Prior to Jan 1, 1982 DISCN No No ⤷  Get Started Free ⤷  Get Started Free ⤷  Get Started Free
Watson Labs CHLOROTHIAZIDE W/ RESERPINE chlorothiazide; reserpine TABLET;ORAL 088151-001 Jun 9, 1983 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

CHLOROTHIAZIDE W/ RESERPINE Market Analysis and Financial Projection

Last updated: February 4, 2026

What Is the Market Outlook for Chlorothiazide with Reserpine?

Chlorothiazide with Reserpine is a combination antihypertensive drug primarily used to manage high blood pressure. While its patent status remains inactive, the product persists as a treatment option in many geographic regions due to established efficacy and low cost.

Globally, antihypertensive drugs account for a significant share of the cardiovascular medication market. The global hypertensive patients number approximately 1.3 billion, with increasing prevalence driven by aging populations, obesity, and lifestyle factors. However, the use of specific formulations like Chlorothiazide with Reserpine is declining, replaced by newer agents with better safety profiles.

Despite this, certain markets—especially those with limited healthcare budgets—continue to rely on older, less costly therapies, underpinning stable or modest demand.

What Are the Fundamental Drivers for Investment?

Market Penetration and Competition

The drug's status as a generic limits patent barriers, resulting in high market competition. Established manufacturers include Teva, Mylan, and Sandoz, offering low-cost options.

Regulatory Environment

In the U.S., the FDA classifies Chlorothiazide with Reserpine as a generic drug. It is approved for long-term hypertension management, but recent updates emphasize newer agents. In emerging markets, regulatory pathways are straightforward due to the availability of bioequivalence data.

Patent & Exclusivity Timeline

The original patents expired decades ago, maintaining no exclusivity period for this combination, leading to commoditization. No significant regulatory extensions or orphan drug designations have been granted, limiting potential for premium pricing.

Safety and Efficacy Profile

The drug's combination can cause orthostatic hypotension, fatigue, and bradycardia, which reduces its appeal against newer omega-blockers and ACE inhibitors. Its efficacy in lowering blood pressure remains comparable to other diuretics, but the safety profile is inferior.

Manufacturing and Supply Chain Considerations

Manufacturing is straightforward, supported by numerous approved APIs. Supply chain stability remains high, with potential risk from raw material shortages, but these are manageable.

What Is the Investment Implication?

Revenue Stability and Growth

Current revenues are modest, estimated at several hundred million USD globally. In mature markets, demand declines slowly, while emerging markets still provide some volume, typically at low margins.

Profitability

Given high competition, profit margins remain thin, often in the single digits. Pricing pressure and healthcare cost containment efforts further diminish profitability over time.

R&D and Lifecycle Management

Investments in new formulations or combination therapies are unlikely to return high value given the drug's age and safety issues. Lifecycle extension strategies, such as patent challenges or formulation improvements, are limited.

Patent and Regulatory Risks

No patent protections exist for this molecule, exposing it to generic competition. Regulatory changes favoring newer drugs could accelerate decline.

Market Outlook Summary

The drug has limited growth potential; the primary value lies in steady cash flow from existing generic sales. Investment risk increases if newer therapies dominate or regulatory policies shift aggressively against older, less safe medications.

What Are the Key Strategic Considerations for Investors?

  • Focus on regional market trends, with particular attention to countries relying on low-cost generics.
  • Assess the risk of regulatory obsolescence due to newer antihypertensive agents.
  • Monitor raw material supply chain stability.
  • Consider potential lifecycle extensions through formulation modifications, though historically limited.
  • Evaluate the competitive landscape, including the presence of multiple generic suppliers.

Key Takeaways

Chlorothiazide with Reserpine offers a stable, low-margin revenue stream driven by generic competition. Its declining use in favor of better-tolerated antihypertensives limits long-term growth. Market attractiveness depends on regional demand, cost dynamics, and regulatory trends. The primary investment appeal resides in steady cash flow rather than growth prospects.

FAQs

Q1: Is Chlorothiazide with Reserpine a high-growth drug?
No. Its use is declining in favor of newer medications, and it remains a low-margin, mature product.

Q2: What regulatory hurdles exist for this drug?
It is a generic with no patent, and regulatory approval mainly involves bioequivalence confirmation. No significant current hurdles, but evolving policies may impact demand.

Q3: Which regions are most relevant for this drug?
Emerging markets, where cost considerations are paramount, and legacy health systems in developed countries, still use this medication.

Q4: Are there opportunities for lifecycle extension?
Limited. Formulation changes or combination fixes are unlikely to boost demand significantly.

Q5: How does the competitive landscape impact prices?
High competition among multiple generic suppliers results in low prices and narrow profit margins.

References

  1. World Health Organization. “Global Burden of Hypertension,” 2021.
  2. US Food and Drug Administration. “Generic Drug Approvals,” 2022.
  3. MarketsandMarkets. “Hypertension Drugs Market,” 2022.
  4. EvaluatePharma. “Top Selling Cardiovascular Drugs,” 2022.
  5. IMS Health Data. “Global Prescription Drug Sales,” 2022.

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