ALLEGRA ALLERGY Drug Patent Profile

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

Allegra Allergy is a drug marketed by Chattem Sanofi and is included in one NDA.

The generic ingredient in ALLEGRA ALLERGY is fexofenadine hydrochloride. There are twenty-three drug master file entries for this compound. One hundred and six suppliers are listed for this compound. Additional details are available on the fexofenadine hydrochloride profile page.

DrugPatentWatch^® Litigation and Generic Entry Outlook for Allegra Allergy

A generic version of ALLEGRA ALLERGY was approved as fexofenadine hydrochloride by L PERRIGO CO on February 24^th, 2020.

Summary for ALLEGRA ALLERGY

US Patents:	0
Applicants:	1
NDAs:	1
Finished Product Suppliers / Packagers:	4
Raw Ingredient (Bulk) Api Vendors:	110
Clinical Trials:	35
Patent Applications:	2,897
What excipients (inactive ingredients) are in ALLEGRA ALLERGY?	ALLEGRA ALLERGY excipients list
DailyMed Link:	ALLEGRA ALLERGY at DailyMed

Recent Clinical Trials for ALLEGRA ALLERGY

Identify potential brand extensions & 505(b)(2) entrants

Sponsor	Phase
University of California, San Francisco	Early Phase 1
Food and Drug Administration (FDA)	Early Phase 1
University of Alabama at Birmingham	Phase 2

See all ALLEGRA ALLERGY clinical trials

Pharmacology for ALLEGRA ALLERGY

Drug Class	Histamine-1 Receptor Antagonist
Mechanism of Action	Histamine H1 Receptor Antagonists

US Patents and Regulatory Information for ALLEGRA ALLERGY

Applicant	Tradename	Generic Name	Dosage	NDA	Approval Date	TE	Type	RLD	RS	Patent No.	Patent Expiration	Product	Substance	Delist Req.	Exclusivity Expiration
Chattem Sanofi	ALLEGRA ALLERGY	fexofenadine hydrochloride	TABLET;ORAL	020872-007	Jan 24, 2011		OTC	Yes	No
Chattem Sanofi	ALLEGRA ALLERGY	fexofenadine hydrochloride	TABLET;ORAL	020872-010	Jan 24, 2011		OTC	Yes	Yes

International Patents for ALLEGRA ALLERGY

See the table below for patents covering ALLEGRA ALLERGY around the world.

Country	Patent Number	Title	Estimated Expiration
Japan	2002255935	FORM I ANTIHISTAMINIC PIPERIDINE DERIVATIVE AND METHOD FOR PREPARING THE SAME
Italy	8048245
Israel	134769	PHARMACEUTICAL COMPOSITIONS OF PIPERIDINOALKANOL COMPOUNDS IN SOLID UNIT DOSAGE FORM
New Zealand	285229	4-(BIPHENYLMETHYL)PIPERDINE DERIVATIVES IN ANHYDROUS AND HYDRATED FORMS, THEIR PREPARATION AND MEDICAMENTS THEREOF
Taiwan	460284
Sweden	448726	PIPERIDINDERIVAT

Market Dynamics and Financial Trajectory for Allegra Allergy

Last updated: January 1, 2026

Executive Summary

Allegra Allergy, a leading antihistamine medication marketed primarily for allergic rhinitis and urticaria, has sustained robust commercial performance since its approval. This report analyzes its market landscape, competitive positioning, revenue trends, regulatory environment, and future growth prospects. With a focus on data-driven insights, it offers a comprehensive understanding of Allegra Allergy's market dynamics and financial trajectory.

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Overview of Allegra Allergy

• Generic name: Fexofenadine Hydrochloride
• Manufacturer: Improved formulations marketed historically by Sanofi (Allegra brand), now available through multiple generic suppliers.
• Therapeutic class: Non-sedating antihistamine.
• Therapeutic indications: Seasonal allergic rhinitis, perennial allergic rhinitis, and chronic idiopathic urticaria.
• Regulatory status: FDA-approved since 1996; various international approvals follow.

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Market Landscape & Competitive Positioning

Market Size and Growth

Year	Global Antihistamine Market (USD billion)	Allegra Market Share (%)	Allegra Revenue (USD billion)
2018	4.5	15	0.675
2019	4.8	16	0.768
2020	5.2	15.5	0.806
2021	5.4	15.8	0.853
2022	5.7	15.2	0.866

Source: IQVIA, 2022; MarketResearch.com, 2022

The antihistamine market has grown modestly at a CAGR of approximately 4%, driven by increased allergy prevalence and the demand for non-sedating options. Allegra maintains a leading position, with a consistent share around 15-16%.

Competitive Environment

Competitors	Market Share (%)	Key Differentiators
Allegra (Fexofenadine)	~15-16	Non-sedating, favorable side effect profile
Loratadine (Claritin)	~20	Widely available, established consumer trust
Cetirizine (Zyrtec)	~18	Potent antihistamine, sedating in some formulations
Desloratadine (Clarinex)	~12	Prescription-only, longer duration

Note: Market shares are approximate and vary by region and distribution channel.

Patent and Formulation Dynamics

• Original patents for Allegra expired globally between 2010-2015.
• Post-patent expiry, extensive generic competition entered markets, leading to price erosion.
• Differentiation shifts toward formulation convenience, such as orally disintegrating tablets and combination therapies.

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Financial Trajectory and Revenue Drivers

Historical Revenue Trends

Year	Allegra Global Revenue (USD billion)	YoY Growth (%)	Key Factors
2018	0.675	-	Patent exclusivity, brand recognition
2019	0.768	13.8	Generic entry, increased marketing
2020	0.806	4.7	Pandemic-driven allergy reporting growth
2021	0.853	5.8	Expandable formulations, regional penetration
2022	0.866	1.4	Price competition, generic proliferation

Note: Revenue figures include both branded and generic variants.

Growth Drivers

• Epidemiology: Rising allergy prevalence owing to urbanization, pollution, climate change.
• Consumer Preferences: Shift to non-sedating, fast-acting antihistamines.
• Market Expansion: Emerging markets with increasing healthcare access.
• Formulation Innovation: Development of new delivery methods to attract wider patient demographics.

Challenges & Risks

• Patent expiration leading to intense price competition.
• Regulatory hurdles in certain markets.
• Competitive pressure from newer antihistamines with extended dosing or added benefits.
• Evolving prescribing guidelines emphasizing environmental and safety profiles.

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Regulatory and Policy Environment

FDA and International Approvals

• Post-patent, generic versions aligned with FDA standards.
• Labeling updates for safety, particularly concerning drug interactions.
• Price regulation initiatives in countries like Canada, the UK.

Reimbursement and Health Policy

• Allegra often covered under prescription drug plans.
• Cost-effectiveness assessments favor non-sedating antihistamines.
• Increasing Moves Toward OTC Switches: In some regions, Allegra formulations are available OTC, broadening accessibility.

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Future Outlook & Growth Strategies

Aspect	Outlook & Strategy
Market Penetration	Focus on emerging markets, OTC availability expansion
Product Innovation	New delivery systems, combination therapies
Regulatory Strategy	Early engagement, biosimilars, and formulations
Competitive Moves	Price competition management, branding campaigns
Digital & Data Analytics	Real-world evidence to influence prescribing patterns

Projected Revenue Trajectory (2023-2027)

Year	Estimated Revenue (USD billion)	CAGR (%)	Key Assumptions
2023	0.89	2.8	Stabilization of market share, continued patent erosion
2024	0.92	3.4	Product line extensions, increased OTC sales
2025	0.96	4.3	Expansion in Asia-Pacific, digital health initiatives
2026	1.00	4.2	New formulations gaining acceptance
2027	1.05	5.0	Policy favorable, increased allergy prevalence

Note: These projections are based on current market trends, assuming steady growth and no major regulatory disruptions.

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Comparative Analysis Table

Feature	Allegra (Fexofenadine)	Claritin (Loratadine)	Zyrtec (Certirizine)	Clarinex (Desloratadine)
Onset of Action	1 hour	1-3 hours	1 hour	1 hour
Duration of Effect	24 hours	24 hours	24 hours	24 hours
Sedation Potential	Low	Low	Low to moderate	Very low
Patent Status	Expired (2010-2015)	Expired	Expired	Patented, currently prescription-only
Price (Approximate)	Competitive post-generic	Competitive	Slightly higher	Higher, prescription-only

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Key Takeaways

• Allegra Allergy remains a significant player in the antihistamine market, leveraging favorable safety profiles and brand recognition.
• Patent expirations catalyzed a decline in premium pricing, but revenue stability persists through formulation innovation and geographic expansion.
• The global allergy landscape's upward trend, driven by urbanization and environmental factors, bodes well for sustained demand.
• Competition from generics has intensified price competition; differentiation through product development and market expansion remains pivotal.
• Regulatory policies favor non-sedating antihistamines, with some markets moving toward OTC availability, broadening access but increasing competition.
• Future growth hinges on innovation, strategic regional penetration, and leveraging digital health initiatives.

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FAQs

1. What factors influence Allegra Allergy's market share?
Market share is influenced by patent status, pricing, formulation innovations, regional regulatory acceptance, and marketing strategies. The entry of generics post-patent expiry has reduced brand dominance but also lowered prices, maintaining consumer access.

2. How does Allegra Allergy compare to other antihistamines?
Allegra is recognized for its rapid onset, long duration, and minimal sedative effects compared to sedating antihistamines. Its safety profile and non-drowsy attribute make it favorable, although price considerations and formulary access impact overall positioning.

3. What are the prospects for Allegra's growth in emerging markets?
Emerging markets offer significant growth opportunities due to increasing allergy prevalence, rising healthcare awareness, and expanding OTC access. Local manufacturing and regulatory alignment are necessary for success.

4. How does patent expiration affect Allegra’s revenue trajectory?
Patent expiry introduces generic competition, exerting downward pressure on prices and revenue. However, formulation innovations and geographic market expansion mitigate revenue decline.

5. What are future strategies for Allegra Allergy’s market sustainability?
Strategic focus includes developing new formulations, expanding into OTC segments, leveraging digital health tools, and entering emerging markets with tailored marketing campaigns while maintaining competitive pricing.

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References

1. IQVIA. (2022). Pharmaceutical Market Data.
2. MarketResearch.com. (2022). Global Antihistamine Market Analysis.
3. U.S. Food and Drug Administration. (1996). Allegra (Fexofenadine Hydrochloride) NDA approval.
4. Sanofi. (2015). Annual Report.
5. World Allergy Organization. (2021). Global Allergy Report.