Last Updated: June 8, 2026

ALDOCLOR-150 Drug Patent Profile


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Which patents cover Aldoclor-150, and when can generic versions of Aldoclor-150 launch?

Aldoclor-150 is a drug marketed by Merck and is included in one NDA.

The generic ingredient in ALDOCLOR-150 is chlorothiazide; methyldopa. There are forty-two drug master file entries for this compound. Additional details are available on the chlorothiazide; methyldopa profile page.

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Questions you can ask:
  • What is the 5 year forecast for ALDOCLOR-150?
  • What are the global sales for ALDOCLOR-150?
  • What is Average Wholesale Price for ALDOCLOR-150?
Summary for ALDOCLOR-150
US Patents:0
Applicants:1
NDAs:1
DailyMed Link:ALDOCLOR-150 at DailyMed

US Patents and Regulatory Information for ALDOCLOR-150

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Merck ALDOCLOR-150 chlorothiazide; methyldopa TABLET;ORAL 016016-001 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

Market Dynamics and Financial Trajectory for ALDOCLOR-150

Last updated: March 24, 2026

What is ALDOCLOR-150?

ALDOCLOR-150 is a combination drug comprising chlorthalidone (a diuretic) and amlodipine (a calcium channel blocker). Approved by the FDA in 1987, it is indicated for the management of hypertension and edema. The drug's patent has expired, allowing generic versions to enter the market.

Market Overview

Market Size and Sales Trends

  • The global antihypertensive drugs market was valued at approximately $22 billion in 2021[1].
  • Diuretic and calcium channel blocker segments collectively account for around 30% of this market[2].
  • ALDOCLOR-150's specific sales are not publicly disclosed; however, its contribution is estimated to be less than 1% of the total antihypertensive market due to the availability of generic alternatives.

Patent and Regulatory Status

  • The original patent expired in 2007, resulting in multiple generics.
  • No current patents or exclusivity rights protect the brand; thus, the product faces competition from generics.

Competitive Landscape

Generic Competition

  • Multiple FDA-approved generic manufacturers produce chlorthalidone and amlodipine separately or in combination.
  • Existing formulations are typically priced 50-70% lower than the brand name, reducing market share for the brand.

Brand vs. Generics

  • Brand-name ALDOCLOR-150 is priced higher given retained brand recognition.
  • Physicians and payers increasingly favor generics due to lower costs.
  • Market share shift toward generics has slowed growth for branded ALDOCLOR-150.

Pricing Dynamics

  • Average wholesale prices (AWP) for branded ALDOCLOR-150 are approximately $150 for a 30-day supply[3].
  • Generics retail at approximately $50 for the same quantity, pressuring profitability.

Market Dynamics

Demand Drivers

  • The global rise in hypertension prevalence increases demand for antihypertensive medications.
  • Cost-containment policies and insurance formulary preferences favor generics.
  • Clinical guidelines favor combination therapies like ALDOCLOR-150 for compliance and efficacy, provided brand-name cost premiums are justified.

Pricing and Reimbursement Policies

  • Payer policies increasingly restrict reimbursement for higher-priced brand medications.
  • Medicare and Medicaid programs favor low-cost generics, reducing revenue potential for the brand.

Formulation and Delivery Trends

  • The industry shifts toward fixed-dose combinations (FDCs) with improved compliance.
  • ALDOCLOR-150 faces competition from newer FDCs with similar or improved profiles.

Financial Trajectory

Revenue Outlook

  • Market share retention for ALDOCLOR-150 is unlikely to grow due to generic competition.
  • Existing revenues will decline gradually as generics expand market penetration.
  • Future revenues could approach near-zero levels unless differentiation or new indications are developed.

Cost Structure and Profitability

  • Profit margins are thin for branded drugs with available generics.
  • Manufacturing costs are relatively stable; pricing pressure reduces profitability.

Strategic Considerations

  • Potential repositioning or commercialization in niche markets may sustain revenue.
  • Reinvesting in line extensions or developing new formulations could offset declining sales.
  • Licensing or acquisition strategies might add value if patent protections are re-established or new patents are filed.

Risks and Opportunities

Risks Opportunities
Market share erosion due to generic competition Develop modified formulations or fixed-dose combinations
Price erosion driven by payer policies Enter emerging markets with less generic penetration
Limited patent protection, leading to revenue decline Licensing new delivery methods or formulations

Conclusion

ALDOCLOR-150 faces a declining financial trajectory driven by patent expiry, high generic competition, and cost-driven prescribing trends. The drug's future positioning depends on strategic diversification, innovation, or market niche exploitation.

Key Takeaways

  • ALDOCLOR-150's patent expired in 2007; current revenues derive mainly from brand loyalty and clinical preference.
  • Generic competition dominates pricing, leading to significant revenue erosion.
  • Market share stability relies on differentiation or new indications; otherwise, revenues decline towards zero.
  • Industry shifts favor fixed-dose combination therapies and cost-effective generics.
  • Strategic repositioning or licensing offers potential avenues for sustaining value.

FAQs

1. Is ALDOCLOR-150 still commercially viable?
Given patent expiry and generic competition, its standalone commercial viability is limited unless combined with strategic repositioning or niche targeting.

2. Can the patent be reinstated or new patents filed to extend exclusivity?
Reinstating patents after expiry is unlikely; however, new formulations or delivery methods can secure new patent protections.

3. How do generic competitors impact the profitability of ALDOCLOR-150?
They significantly suppress prices, reduce margins, and diminish market share for the branded product.

4. Are there clinical advantages to ALDOCLOR-150 over other antihypertensives?
The combination provides convenience and adherence benefits, but no unique clinical superiority compared to newer therapies.

5. What strategies can manufacturers pursue to sustain revenues?
Options include developing advanced formulations, exploring new indications, licensing, or entering emerging markets.


References

[1] MarketWatch. (2022). Global antihypertensive drugs market size.
[2] Grand View Research. (2021). Antihypertensive Drugs Market Analysis.
[3] Redbook. (2022). Average Wholesale Price Data.

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