Last Updated: May 2, 2026

diltiazem malate - Profile


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What are the generic sources for diltiazem malate and what is the scope of patent protection?

Diltiazem malate is the generic ingredient in two branded drugs marketed by Merck and Biovail, and is included in two NDAs. Additional information is available in the individual branded drug profile pages.

Summary for diltiazem malate
US Patents:0
Tradenames:2
Applicants:2
NDAs:2

US Patents and Regulatory Information for diltiazem malate

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Merck TIAMATE diltiazem malate TABLET, EXTENDED RELEASE;ORAL 020506-001 Oct 4, 1996 DISCN No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Merck TIAMATE diltiazem malate TABLET, EXTENDED RELEASE;ORAL 020506-002 Oct 4, 1996 DISCN No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Merck TIAMATE diltiazem malate TABLET, EXTENDED RELEASE;ORAL 020506-003 Oct 4, 1996 DISCN No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Biovail TECZEM diltiazem malate; enalapril maleate TABLET, EXTENDED RELEASE;ORAL 020507-001 Oct 4, 1996 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

Expired US Patents for diltiazem malate

Applicant Tradename Generic Name Dosage NDA Approval Date Patent No. Patent Expiration
Merck TIAMATE diltiazem malate TABLET, EXTENDED RELEASE;ORAL 020506-003 Oct 4, 1996 4,880,631 ⤷  Start Trial
Merck TIAMATE diltiazem malate TABLET, EXTENDED RELEASE;ORAL 020506-002 Oct 4, 1996 4,880,631 ⤷  Start Trial
Merck TIAMATE diltiazem malate TABLET, EXTENDED RELEASE;ORAL 020506-001 Oct 4, 1996 4,880,631 ⤷  Start Trial
Merck TIAMATE diltiazem malate TABLET, EXTENDED RELEASE;ORAL 020506-002 Oct 4, 1996 4,968,507 ⤷  Start Trial
Merck TIAMATE diltiazem malate TABLET, EXTENDED RELEASE;ORAL 020506-003 Oct 4, 1996 4,968,507 ⤷  Start Trial
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >Patent No. >Patent Expiration

Diltiazem Malate: Investment Scenario and Fundamentals Analysis

Last updated: March 2, 2026

How does the market for diltiazem malate look in terms of demand and competition?

Diltiazem malate is a calcium channel blocker primarily used to treat hypertension, angina, and certain arrhythmias. It is a salt form of diltiazem with increased bioavailability and stability. The global market size for calcium channel blockers (including diltiazem derivatives) was valued at approximately $3.5 billion in 2022 and is projected to grow at around 4.5% CAGR through 2028[1].

Key competitors include marketed branded products and generics produced by companies like Sandoz, Teva, and Mylan. The entry barriers for generics are moderate due to existing patents or exclusivities for specific formulations but vary by jurisdiction.

What are the supply chain and manufacturing considerations?

Manufacturability depends on synthesis complexity and raw material availability. Diltiazem malate synthesis involves multiple steps, including chemical reaction, crystallization, and formulation. The main raw materials are diltiazem base and malic acid.

Manufacturers with established APIs (Active Pharmaceutical Ingredients) production facilities benefit from lower capex for scale-up. Regulatory compliance, especially for APIs, requires Good Manufacturing Practice (GMP) standards, which are well-understood for existing calcium channel blocker manufacturing.

How do patent landscapes and regulatory pathways influence investment?

Most formulations of diltiazem (including malate salts) are off-patent or nearing patent expiry, increasing generic competition potential. However, specific sustained-release or novel delivery formulations may be protected by patents, creating differentiation opportunities.

FDA approval for generic versions depends on demonstrating bioequivalence[2]. Market access strategies include partnerships with established pharmaceutical companies to navigate regulatory processes efficiently.

What are the key financial and licensing considerations?

Margins for generic diltiazem malate range from 20% to 50%, depending on scale, R&D costs, and patent status[3]. Entry costs involve registration, manufacturing setup, and validation.

Licensing agreements can reduce time-to-market and regulatory risk but typically involve royalties of 10-15% on sales. Patent expiry dates vary by region but generally fall between 2024 and 2027 for previous formulations.

What are the supply and pricing risks?

Pricing pressure from generic entrants accelerates after patent expiry, leading to price erosion. Supply chain disruptions can impact raw material costs, especially malic acid and diltiazem base. Market demand remains stable, driven by volume-based prescribing for hypertension and angina, but rebound effects depend on new formulation approvals.

How does regional regulation affect market entry?

In North America, FDA approvals require bioequivalence data and proper labeling. The European Medicines Agency (EMA) follows similar procedures with additional emphasis on quality standards. Asia-Pacific markets (e.g., India, China) offer faster approval processes with lower costs but involve complex registration pathways.

Investment drivers and risks

Drivers:

  • Growing prevalence of hypertension globally
  • Expiring patents on key formulations
  • High generic market profitability

Risks:

  • Price erosion post-patent expiry
  • Regulatory delays for new formulations
  • Supply chain disruptions and raw material shortages

Key Financial Indicators and Forecasts

Indicator 2022 2027 (Projected) CAGR
Market Size (USD billion) 3.5 4.8 4.5%
Estimated Share (Generic) 60% 70% N/A
Typical Gross Margin (%) 20-50% 20-50% N/A

Summary

The diltiazem malate market presents consistent demand, driven by cardiovascular therapeutic needs. Opportunities exist around generic manufacturing post-patent expiration, with potential margins attractive for established players. Market dynamics are sensitive to regulatory developments, patent landscapes, and price competition.


Key Takeaways

  • Diltiazem malate benefits from a large, stable cardiovascular drug market with moderate entry barriers.
  • Patent expiries between 2024 and 2027 open generic opportunities, favoring price competition.
  • Manufacturing depends on scalable GMP API processes; supply chain resilience is critical.
  • Regulatory pathways are well-understood but vary by region; bioequivalence submission is essential.
  • Margins are vulnerable to intense pricing pressure, with significant upside for differentiated formulations or regional entry strategies.

FAQs

Q1: What are the main patent concerns for diltiazem malate?
Patent protection predominantly covers specific formulations, delivery mechanisms, or combination drugs. Basic salt forms like malate are usually off-patent after expiry, opening generic opportunities.

Q2: How competitive is the market for generic diltiazem malate?
It is highly competitive post-patent expiry, with established players dominating. Entry requires scale, GMP facilities, and regulatory compliance.

Q3: What are typical development costs for a generic bioequivalent diltiazem malate?
Development costs range from $5 million to $10 million, covering bioequivalence studies, regulatory filings, and manufacturing validation.

Q4: Are there unmet needs in diltiazem formulations?
Yes, sustained-release formulations with improved patient adherence are under development, potentially extending patent life and market share.

Q5: How does regional regulation influence market entry timing?
Regulatory approval duration varies; North America and Europe typically require 9-12 months. Asian markets may approve within 6 months but involve different registration standards.


References
[1] MarketsandMarkets. (2022). Calcium Channel Blockers Market.
[2] U.S. Food and Drug Administration. (2020). Bioequivalence Guidance.
[3] IMS Health. (2022). Generic Drug Pricing and Profit Margins Report.

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