DIPHENHYDRAMINE HYDROCHLORIDE PRESERVATIVE FREE: Pharmaceutical manufacturers, suppliers, and wholesalers

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Applicant	Tradename	Generic Name	Dosage	NDA	NDA/ANDA	Supplier	Package Code	Package	Marketing Start
Fresenius Kabi Usa	DIPHENHYDRAMINE HYDROCHLORIDE PRESERVATIVE FREE	diphenhydramine hydrochloride	INJECTABLE;INJECTION	091526	ANDA	Fresenius Kabi USA, LLC	76045-102-10	24 BLISTER PACK in 1 CARTON (76045-102-10) / 1 SYRINGE, GLASS in 1 BLISTER PACK (76045-102-00) / 1 mL in 1 SYRINGE, GLASS	2013-03-26
Fresenius Kabi Usa	DIPHENHYDRAMINE HYDROCHLORIDE PRESERVATIVE FREE	diphenhydramine hydrochloride	INJECTABLE;INJECTION	091526	ANDA	Fresenius Kabi USA, LLC	76045-235-10	24 BLISTER PACK in 1 CARTON (76045-235-10) / 1 SYRINGE, GLASS in 1 BLISTER PACK (76045-235-01) / 1 mL in 1 SYRINGE, GLASS	2025-06-02
>Applicant	>Tradename	>Generic Name	>Dosage	>NDA	>NDA/ANDA	>Supplier	>Package Code	>Package	>Marketing Start

Last updated: July 29, 2025

Introduction

Diphenhydramine Hydrochloride (DPH) is a widely utilized antihistamine primarily used to treat allergic reactions, insomnia, and motion sickness. Its preservative-free formulation is crucial for patients sensitive to preservatives or requiring infusion therapies without additive-related complications. Securing reliable suppliers for preservative-free diphenhydramine hydrochloride is essential for pharmaceutical companies, healthcare providers, and distributors to maintain high standards of safety, efficacy, and regulatory compliance. This article explores key suppliers specializing in preservative-free diphenhydramine hydrochloride, detailing their offerings, manufacturing practices, and market positions.

Understanding the Importance of Preservative-Free Formulations

Preservative-free formulations are integral in specific medical scenarios, including:

Infusion therapies: Where preservative agents like benzyl alcohol can induce adverse reactions.
Sensitive populations: Such as neonates, pregnant women, or patients with compromised immune systems.
Intravenous (IV) administration: Requiring formulations devoid of preservatives to minimize infusion-related reactions.

The demand for preservative-free diphenhydramine hydrochloride has surged, prompting manufacturers to source from specialized suppliers committed to stringent quality standards, Good Manufacturing Practices (GMP), and regulatory compliance [1].

Leading Suppliers of Preservative-Free Diphenhydramine Hydrochloride

1. WINKLER PHARMA

Overview: WINKLER PHARMA, based in Germany, is recognized for its high-quality pharmaceutical excipients and active pharmaceutical ingredients (APIs). The company’s focus on sterile and preservative-free formulations positions it as a prominent supplier for antihistamines like diphenhydramine hydrochloride.

Product Range & Quality Assurance:

Offers certified preservative-free diphenhydramine hydrochloride suitable for injectable forms.
Adheres to EU-GMP standards and ISO 9001 certifications.
Implements rigorous testing, including endotoxin, sterility, and residual solvents, aligning with WHO guidelines.

Market Presence:

Supplies major pharmaceutical firms in Europe, North America, and Asia.
Provides customized packaging and regulatory documentation to facilitate global distribution.

2. Xian Tianlong Pharmaceutical Co., Ltd.

Overview:
Located in China, Xian Tianlong specializes in health-active pharmaceutical ingredients, including antihistamines. Its manufacturing facilities are compliant with Chinese GMP standards and are increasingly recognized internationally.

Product Portfolio:

Produces preservative-free diphenhydramine hydrochloride suitable for injectable and oral formulations.
Emphasizes impurity control and consistent batch-to-batch quality, compliant with U.S. FDA and European EMA requirements.

Supply Chain & Capabilities:

Capable of large-scale manufacturing with dedicated sterile production lines.
Provides comprehensive documentation including Certificates of Analysis (CoA), batch records, and stability data.

3. Jiangsu Hengrui Medicine Co., Ltd.

Overview:
A leading Chinese pharmaceutical manufacturer, Jiangsu Hengrui has expanded its API portfolio to include antihistamines, emphasizing preservative-free formulations for global export.

Quality & Certifications:

GMP-certified by Chinese authorities, with efforts underway for EU-GMP and US FDA approvals.
Implements stringent quality controls to ensure preservative-free and sterile products.

Advantages:

Competitive pricing owing to integrated manufacturing processes.
Extensive capacity for bulk production to meet global supply demands.

4. Shanghai Sine Pharmaceutical Co., Ltd.

Overview:
Specialized in providing APIs for injectable medicines, Shanghai Sine has invested significantly in sterile API production for preservatives-free formulations.

Product Certifications:

Holds ISO 13485, GMP, and cGMP certifications.
Ensures sterile APIs with low endotoxin levels appropriate for intravenous use.

Market Focus:

Serves North America, Europe, and Southeast Asian markets.
Offers tailored solutions, including custom formulations of preservative-free diphenhydramine hydrochloride.

5. International API Brokers and Distributors

Major pharmaceutical ingredients trading companies such as Spectrum Chemical, Fisher Scientific, and Sigma-Aldrich often source preservative-free diphenhydramine hydrochloride from established manufacturers. These brokers provide:

Verified certificates of analysis, sterility, and endotoxin testing.
Supply chain reliability with contingency options.
Regulatory support for the import/export process.

Key Considerations in Supplier Selection

When sourcing preservative-free diphenhydramine hydrochloride, pharmaceutical companies should evaluate:

Regulatory Compliance: Suppliers must meet CGMP, ISO standards, and hold necessary certifications (e.g., FDA, EMA, TGA).
Product Certification: CoA, sterility testing, endotoxin levels, and impurity profiles.
Manufacturing Capability: Sterile, single-use or dedicated production lines to prevent cross-contamination.
Supply Reliability: Consistent batch delivery, sufficient production capacity, and contingency planning.
Pricing & Terms: Competitive pricing aligned with quality standards and flexible contract terms.

Emerging Trends and Market Outlook

The increasing emphasis on personalized medicine and sterile injectable therapies has driven demand for preservative-free APIs. Regulatory agencies’ tightening standards further incentivize pharmaceutical companies to collaborate with proven suppliers maintaining high purity and sterility levels.

Furthermore, regional expansions of Chinese API manufacturers, driven by government policies promoting pharmaceutical exports, have made global sourcing more competitive. Companies are now prioritizing transparency, traceability, and compliance, facilitated by digital quality management systems.

Conclusion

The supply landscape for preservative-free diphenhydramine hydrochloride is dynamic, dominated by established regional manufacturers and global distributors capable of meeting stringent quality standards. Selecting the right supplier hinges on compliance certifications, manufacturing expertise, supply chain robustness, and pricing strategies. As demand for preservative-free formulations grows, fostering relationships with reputable suppliers will be pivotal for pharmaceutical companies striving for safety, efficacy, and regulatory adherence.

Key Takeaways

Quality Assurance: Prioritize suppliers with certified GMP standards, comprehensive testing, and regulatory approvals.
Supply Stability: Engage with manufacturers capable of large-scale, consistent production to avoid shortages.
Regulatory Compatibility: Ensure suppliers provide requisite documentation and are compliant with target markets’ regulations.
Market Diversification: Consider diversified sourcing from multiple suppliers across regions for risk mitigation.
Emerging Opportunities: Leverage rising demand for preservative-free APIs in sterile formulations to enhance portfolio offerings.

FAQs

1. What distinguishes preservative-free diphenhydramine hydrochloride from standard formulations?

Preservative-free diphenhydramine hydrochloride lacks added stabilizers or antimicrobial agents, making it suitable for sensitive patient populations and sterile injectable formulations, reducing the risk of adverse reactions associated with preservatives.

2. Which regulatory certifications should suppliers of preservative-free diphenhydramine hydrochloride possess?

Suppliers should hold GMP certification from relevant authorities (FDA, EMA, Chinese GMP), ISO certifications, and provide clear Certificates of Analysis demonstrating sterility, endotoxin levels, and impurity profiles.

3. What are the main challenges in sourcing preservative-free diphenhydramine hydrochloride globally?

Challenges include maintaining consistent quality, ensuring sterile manufacturing conditions, navigating varied regulatory landscapes, and managing supply chain disruptions.

4. How do Chinese API manufacturers compare to Western counterparts in producing preservative-free diphenhydramine hydrochloride?

Chinese manufacturers like Jiangsu Hengrui offer competitive pricing, large production capacities, and increasing compliance with international standards. However, thorough qualification and quality audits are necessary to ensure regulatory compliance.

5. What should pharmaceutical companies consider when evaluating suppliers for preservative-free APIs?

They should assess product quality, certification status, manufacturing capacity, lead times, regulatory compliance, and supply chain reliability to ensure consistent procurement.

References

World Health Organization. (2021). WHO Guidelines on Good Manufacturing Practices for Active Pharmaceutical Ingredients.

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