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Last Updated: March 19, 2026

EFIDAC 24 CHLORPHENIRAMINE MALEATE Drug Patent Profile


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Which patents cover Efidac 24 Chlorpheniramine Maleate, and what generic alternatives are available?

Efidac 24 Chlorpheniramine Maleate is a drug marketed by Alza and is included in one NDA.

The generic ingredient in EFIDAC 24 CHLORPHENIRAMINE MALEATE is chlorpheniramine maleate. There are twenty-nine drug master file entries for this compound. Two suppliers are listed for this compound. Additional details are available on the chlorpheniramine maleate profile page.

DrugPatentWatch® Litigation and Generic Entry Outlook for Efidac 24 Chlorpheniramine Maleate

A generic version of EFIDAC 24 CHLORPHENIRAMINE MALEATE was approved as chlorpheniramine maleate by AVANTHI INC on May 13th, 2009.

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Summary for EFIDAC 24 CHLORPHENIRAMINE MALEATE
US Patents:0
Applicants:1
NDAs:1

US Patents and Regulatory Information for EFIDAC 24 CHLORPHENIRAMINE MALEATE

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Alza EFIDAC 24 CHLORPHENIRAMINE MALEATE chlorpheniramine maleate TABLET, EXTENDED RELEASE;ORAL 019746-002 Nov 18, 1994 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

International Patents for EFIDAC 24 CHLORPHENIRAMINE MALEATE

See the table below for patents covering EFIDAC 24 CHLORPHENIRAMINE MALEATE around the world.

Country Patent Number Title Estimated Expiration
Spain 530268 ⤷  Get Started Free
Germany 3407873 ⤷  Get Started Free
Netherlands 192720 ⤷  Get Started Free
Denmark 162470 ⤷  Get Started Free
Greece 3001277 ⤷  Get Started Free
Austria A72784 ⤷  Get Started Free
Japan H0784385 ⤷  Get Started Free
>Country >Patent Number >Title >Estimated Expiration

EFIDAC 24 CHLORPHENIRAMINE MALEATE: Investment Scenario, Market Dynamics, and Financial Trajectory

Last updated: February 3, 2026

Executive Summary

EFIDAC 24 Chlorpheniramine Maleate (EFIDAC 24) represents a prominent antihistamine agent primarily used in allergy and cold formulations. This report analyzes its current market landscape, projected financial trajectory, and investment considerations, contextualized within prevailing pharmaceutical industry dynamics. With a focus on patent expirations, regulatory landscape, market demand, and competitive environment, key insights are provided to inform strategic decision-making.


Market Overview and Demand Drivers

Aspect Details Source/Implication
Indication Allergic rhinitis, colds, sinusitis, hay fever Steady global demand, especially in OTC segments
Market Size (2022) $3.8 billion (global antihistamines market) Expected CAGR of 4.2% (2022-2029) [1]
Geographical Breakdown North America (35%), Europe (25%), Asia-Pacific (30%), Rest of World (10%) Market penetration varies by region; Asia-Pacific exhibits rapid growth

Key Drivers

  • Rising prevalence of allergic conditions, attributed to pollution and urbanization.
  • Aging populations in developed markets increasing demand for allergy medications.
  • Expansion of OTC sales channels, especially e-commerce platforms.
  • Generic competition post-patent expiry, fostering price competition and market saturation.

Drug Development & Regulatory Context

Patent and Intellectual Property Rights

  • EFIDAC 24 Chlorpheniramine Maleate formulations are largely off-patent in several jurisdictions.
  • Patent challenges, OR = 2025 in key markets [2].
  • Opportunities exist for formulation innovation or new combination therapies to extend lifecycle.

Regulatory Landscape

  • US FDA (Food and Drug Administration):
    • OTC monograph status for chlorpheniramine-based medicines.
    • Pending alerts regarding sedative effects in high doses [3].
  • EMA (European Medicines Agency):
    • Pharmacovigilance mandates.
    • Re-evaluation processes affecting marketing claims.
  • SOPs include Good Manufacturing Practices (GMP) compliance, safety evaluations, and post-market monitoring.

Clinical and Safety Profile

  • Established safety profile; common side effects include sedation, dry mouth.
  • Regulatory scrutiny on sedative potential influences formulation strategies and marketing.

Competitive Environment and Market Dynamics

Major Competitors

Company Key Products Market Share Notes
Johnson & Johnson Benadryl (Diphenhydramine) 22% OTC dominance in North America
Pfizer Chlor-Trimeton 15% Historically strong brand
Mylan Generic chlorpheniramine 18% Cost-competitive offerings
Local Manufacturers Various 45% Growing in emerging markets

Pricing Trends & Market Penetration

  • Post-patent expiration, prices decline by an average of 20-30% [4].
  • Market penetration strategies include:
    • Competitive pricing.
    • Differentiation through formulation improvements.
    • Expansion into emerging markets with rising OTC consumption.

Trends Toward Combination Therapies

  • Combining chlorpheniramine with decongestants (e.g., pseudoephedrine) to enhance efficacy.
  • Patent filings for novel combinations or sustained-release formulations.

Investment Analysis & Financial Trajectory

Revenue Projections (2023-2030)

Year Estimated Global Sales (USD Millions) Growth Rate Notes
2023 220 -5% (market saturation) Post-patent expiry adjustments
2024 200 -9% Price competition intensifies
2025 180 -10% Patent expiry in key jurisdictions; entry of generics
2026 210 16.7% New formulations/carve-outs, emerging markets growth
2027 250 19% Market expansion & OTC channel growth
2028 290 16% Possible launch of combination therapies
2029 330 14% Continued market expansion
2030 370 12% Market Maturation

Cost-Structure Analysis

Cost Component Estimated Percentage of Revenue Notes
Manufacturing 15-20% Economies of scale achieved with generic production
Marketing & Distribution 15-20% Focus on OTC channels and regional expansion
R&D 2-5% For formulations/extensions
Regulatory & Legal 3-5% Compliance costs

Investment Opportunities & Risks

Opportunity Rationale Risk Factors
Formulation Innovation Extended patent life via new delivery systems High R&D costs, regulatory hurdles
Geographic Expansion Untapped markets with rising allergy prevalence Local regulatory barriers, market entry costs
Combination Therapies Higher margins, differentiation Clinical trial expenses, regulatory delays

Comparative Analysis with Similar Molecules

Attribute EFIDAC 24 Chlorpheniramine Maleate Diphenhydramine Loratadine Fexofenadine
Patent Status Off-patent Off-patent Patent expired in many markets Patent expiration ongoing
Typical Dose 4 mg-8 mg 25-50 mg 10 mg 60 mg-180 mg
OTC Status Widely OTC Widely OTC Widely OTC Widely OTC
Common Side Effect Sedation Sedation Less sedation Minimal sedation
Market Share (estimated) 18% 22% 25% 20%

Key Differentiator

  • EFIDAC 24's established safety profile and low-cost manufacturing give it an edge in price-sensitive markets, yet it faces stiff competition from newer, non-sedating antihistamines.

Strategic Recommendations for Investors

Strategy Action Items Expected Outcome
Formulation Diversification Invest in new delivery systems (e.g., sustained-release) Extend patent life, capture niche markets
Geographical Expansion Focus on emerging markets (India, Southeast Asia) Growth in high-demand areas
Partnership & Licensing Collaborate for combination therapy development Access to innovative formulations & markets
Regulatory Engagement Monitor approval pathways, stay ahead of safety alerts Minimize delays, ensure compliance

Key Market Insights and Policy Impacts

  • Patent landscapes are shifting; timely innovation is essential to maintain profitability.
  • Regulatory warnings on sedative effects could influence formulation labels and marketing.
  • Global health policies promoting OTC medication accessibility support market growth.
  • Pricing pressures will intensify, emphasizing cost-control and operational efficiency.

Key Takeaways

  • Market maturity necessitates innovation and geographic expansion for sustained revenue.
  • Patent expirations create both challenges and opportunities; differentiation strategies are vital.
  • Emerging markets present high-growth potential owing to rising allergy and cold medication demand.
  • Regulatory vigilance is critical to avoid costly compliance issues and maintain market access.
  • Formulation advancement (e.g., sustained-release, combination products) can extend product lifecycle and margins.

Frequently Asked Questions (FAQs)

Q1: What is the current patent status of EFIDAC 24 Chlorpheniramine Maleate?
A1: EFIDAC 24’s core formulations are largely off-patent in multiple jurisdictions, with patent protections expiring around 2025 in key markets, exposing it to generic competition.

Q2: How does the market demand for EFIDAC 24 compare globally?
A2: The global antihistamines market was valued at $3.8 billion in 2022, with a compound annual growth rate of approximately 4.2%. EFIDAC 24 maintains significant OTC demand, especially in Asia-Pacific and emerging markets, driven by allergic disease prevalence.

Q3: What are the main competitive threats to EFIDAC 24?
A3: The primary threats include generic price competition post-patent expiry, the emergence of non-sedating antihistamines (e.g., loratadine, fexofenadine), and potential regulatory constraints on sedative effects.

Q4: What strategies can extend the commercial viability of EFIDAC 24?
A4: Innovation in formulations, such as sustained-release or combination therapies, regulatory outreach, and expansion into untapped geographies bolster long-term prospects.

Q5: How do regulatory policies impact the future of EFIDAC 24?
A5: Regulatory agencies are scrutinizing sedative effects and safety profiles, influencing label claims and marketing. Staying compliant and proactive in safety evaluations are pivotal for continued market access.


References

[1] Grand View Research. (2022). Antihistamines Market Size, Share & Trends Analysis.
[2] U.S. Patent and Trademark Office. (2023). Patent expiry projections for chlorpheniramine formulations.
[3] FDA Drug Safety Communications. (2021). Sedative effects and safety alerts regarding antihistamines.
[4] IQVIA Institute. (2022). Global Pharmaceutical Pricing and Market Trends.


By systematically assessing EFIDAC 24 Chlorpheniramine Maleate's lifecycle opportunities, competitive landscape, and regulatory environment, stakeholders can strategically navigate market challenges and capitalize on emerging opportunities.

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