Last Updated: June 17, 2026

phenylephrine hydrochloride; pyrilamine maleate - Profile


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What are the generic drug sources for phenylephrine hydrochloride; pyrilamine maleate and what is the scope of freedom to operate?

Phenylephrine hydrochloride; pyrilamine maleate is the generic ingredient in one branded drug marketed by Allergan and is included in one NDA. Additional information is available in the individual branded drug profile pages.

Summary for phenylephrine hydrochloride; pyrilamine maleate
US Patents:0
Tradenames:1
Applicants:1
NDAs:1

US Patents and Regulatory Information for phenylephrine hydrochloride; pyrilamine maleate

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Allergan PREFRIN-A phenylephrine hydrochloride; pyrilamine maleate SOLUTION/DROPS;OPHTHALMIC 007953-001 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

Investment and Fundamentals Analysis of Phenylephrine Hydrochloride and Pyrilamine Maleate

Last updated: March 4, 2026

What are the market dynamics for phenylephrine hydrochloride and pyrilamine maleate?

Phenylephrine hydrochloride (PE) and pyrilamine maleate (PM) are active pharmaceutical ingredients primarily used in over-the-counter (OTC) cold and allergy medications. The global market for these compounds is influenced by regulatory trends, manufacturing costs, patent status, and shifts in consumer preferences.

Market size estimates for these drugs are integrated within the broader OTC antihistamine and decongestant markets, which are valued at approximately $8 billion globally in 2023, with a compound annual growth rate (CAGR) of 3.5%. Market growth is constrained by increased competition from generic manufacturers and the decline of some branded formulations.

What are the supply chain and manufacturing considerations?

Phenylephrine hydrochloride is produced via chemical synthesis involving phenylethanol and benzaldehyde derivatives. It has multiple manufacturing sources across China, India, and Europe.

Pyrilamine maleate synthesis is complex, involving multiple steps with intermediates. It has limited manufacturing sources, primarily in India and China. Manufacturing costs remain stable but are sensitive to raw material price fluctuations, including anisaldehyde and other intermediates.

Regulatory compliance, such as Good Manufacturing Practice (GMP) standards, is mandatory for all suppliers. Patent expirations have globally reduced barriers to market entry, increasing competitive pressure.

What are the key regulatory and patent considerations?

Both PE and PM are currently off-patent or have expired patents in most jurisdictions, facilitating generic competition. Regulatory agencies, including FDA and EMA, generally recognize these drugs as safe for OTC use with established formulations.

The key approval hurdles are related to manufacturing quality standards and product stability documentation. No recent major regulatory changes have significantly impeded market access.

How do demand forecasts look for phenylephrine hydrochloride and pyrilamine maleate?

Demand is driven by OTC cold and allergy medication sales, which remain stable despite the growth of alternative treatments such as second-generation antihistamines and nasal sprays.

In retail channels, PE is often used as a decongestant in combination formulations—to treat nasal congestion. PM is part of multi-symptom allergy formulas, often combined with chlorpheniramine or diphenhydramine.

Forecasts predict a slight decline in preference for phenylephrine-based decongestants due to questions about efficacy, with some markets shifting toward alternative agents like oxymetazoline.

What are the investment risks and opportunities?

Risks:

  • Regulatory shifts: Changes reducing OTC status or imposing stricter manufacturing standards.
  • Market saturation: Increased competition from generics eroding margins.
  • Supply chain disruptions: Raw material shortages or geopolitical tensions affecting manufacturing.

Opportunities:

  • Emerging markets: Increasing OTC OTC sales in Asia, Latin America, and Africa.
  • Formulation innovations: Developments in combination products could renew demand.
  • Regulatory reclassification: Potential reintroduction as prescription drugs in certain regions.

How do the fundamentals compare to other OTC pharmaceutical ingredients?

Parameter Phenylephrine Hydrochloride Pyrilamine Maleate
Patent status Off-patent Off-patent
Manufacturing complexity Moderate High
Market concentration Moderate Low
Regulatory hurdles Low Low
Global production regions Asia, Europe Asia, Europe

What are recent technological or formulation trends?

New formulation approaches aim to improve bioavailability and shelf life. Micronization and nanoparticle delivery systems are under exploration for PE. PM formulations are being combined in multi-symptom relief products, possibly expanding market size.

What is the outlook for pricing and margins?

Pricing remains under pressure from generic competition. Margins for branded products retain strength, but price erosion affects overall profitability in the generic segment. Vertical integration and supply chain efficiencies are critical for maintaining margins.

Key Takeaways

  • Both PE and PM are mature ingredients with established supply and regulatory pathways.
  • Patent expirations have increased market entry but intensified price competition.
  • Demand sustains primarily through OTC cold and allergy medications, with potential growth in emerging markets.
  • Supply chain risks include raw material costs and geopolitical tensions.
  • Formulation innovations and regional market expansion present opportunities for value creation.

FAQs

1. Are phenylephrine hydrochloride and pyrilamine maleate suitable for investment in generic markets?
Yes, due to patent expirations and widespread manufacturing, the ingredients are accessible for generic competitors. Margins depend on production efficiencies and market share.

2. What impact could regulatory changes have on these ingredients?
Enhanced safety standards or reclassification of OTC drugs as prescription-only could reduce demand. Current regulatory environments are stable but subject to regional shifts.

3. How is market demand expected to evolve?
Demand remains stable in developed countries, with potential growth in emerging regions. Declines may occur if consumer preferences shift toward newer agents.

4. What are the main cost drivers for production?
Raw material costs, manufacturing standards, and quality control expenses are primary factors. Raw material price volatility influences margins.

5. What are strategic considerations for market entry?
Enter markets with limited competition, achieve cost efficiencies, and develop formulations that meet regional regulatory standards.

References

  1. Grand View Research. (2023). OTC Market Size and Trends. https://www.grandviewresearch.com/industry-analysis/over-the-counter-otc-market
  2. U.S. Food and Drug Administration. (2022). OTC Drug Review. https://www.fda.gov/drugs/over-counter-otc-drugs
  3. MarketWatch. (2023). Pharmaceutical Ingredients Market Analysis. https://www.marketwatch.com/industry/pharmaceutical-ingredients

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