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As drug manufacturers aim for higher safety standards and enhanced patient care, controlling the drug product at the point-of-use in a hospital or clinical environment remains a significant challenge. The method of vial access often varies, increasing the risk of adverse patient outcomes, such as stopper cores or fragments entering the drug product. If injected, these fragments can lead to cardiovascular events and other complications. Several factors contribute to stopper coring and fragmentation in the field, primarily influenced by the technique of the practitioner and the properties of the elastomeric closure.

Sanjeev Seenath

July 09, 2025

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Previous Blogs

Daikyo D Sigma® 1mL Long Pistons – Performance Excellence

By Katie Espenshade

August 21, 2020

West and its partner Daikyo have introduced a superior quality elastomeric piston the Daikyo D Sigma^® 1mL long piston, substantially raising the standard for product acceptance. The D Sigma piston combines Daikyo best practices with a known formulation (D21-7H), Daikyo Flurotec^® film, RB2 Coating, RSV^® and RUV^® processing with key innovation improvements of automated dimensional measurements, tight Acceptable Quality Levels (AQLs), particulate testing per ISO 8871-3, and enhanced vision inspection to achieve high levels of performance and consistency.

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Films and Coatings

Pharmaceutical Packaging Components

Prefillable Systems

Self Injection Devices

Vial Containment Solutions

Washing and Sterilization

Reconstitution and Transfer Devices

Select a sub-category to view results

Analytical Lab Services

Contract Manufacturing

Fill-Finish

Regulatory Support

Select a sub-category to view results

Cell and Gene Therapy Packaging

Drug Development Process

Regulatory Challenges

Transitioning to Combination Products

Select a sub-category to view results

Corporate Development

ESG/Sustainability

One West Team (Employee Culture)

Our Culture of Giving (Philanthropy)

Research and Development