
PDA Technical Glossary
PDA Technical Reports are highly valued membership benefits because they offer expert guidance and opinions on important scientific and regulatory topics and are used as essential references by industry and regulatory authorities around the world. These reports include terms which explain the material and enhance the reader’s understanding.
The database presented here includes the glossary terms from all current technical reports. The database is searchable by keyword, topic, or by technical report. Each definition provided includes a link to the source technical report within the PDA Technical Report Portal.
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Component, Primary
Element of the assembled prefilled syringe (needle, plunger stopper and tip closure, or adhesive) directly in contact with the drug. (TR 73)
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Component, Secondary
Element of the assembled prefilled syringe (plunger rod, backstop, or safety system) that interacts with the primary components and provides functionality to the delivery system. (TR 73)
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Contextual Inquiry
Ethnographic research method used to observe and analyze behaviors in actual end-use contexts (actual environments and use scenarios). (TR73)
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Elastomer
Thermoplastic material formulation (that may or may not contain rubber/natural latex) derived from elastic polymer; often used interchangeably with the term “rubber.” (TR73)
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Extractable
A chemical component that is removed from a material by application of an artificial or exaggerated force (e.g., solvent, temperature, time). The term extractable is often erroneously used to describe a leachable. (TR14) (TR15) (TR26) (TR41) (TR45) Chemical substances that can be extracted from components of material process fluid contact surfaces by exertion of an exaggerated force (e.g., organic solvent, extreme elevated temperature, ionic strength, pH, contact time, etc.) Extractables may represent most but not all of the potential leachables that may be seen in process fluids. (TR66) Extractables are organic and inorganic chemical entities that can be released from a pharmaceutical packaging/delivery system, packaging component, or packaging material of construction under laboratory conditions. (TR54-4) Organic or inorganic chemical entity that is forced out of container closure system materials and components under laboratory experimental conditions. (TR73)
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Formative Usability Evaluation
Observed actual or simulated use of early prototypes to help reliably identify product conceptspecific, use-related hazards that may have been missed by other methods. (TR73)
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Leachable
A chemical component that migrates from a contact surface into a drug product or process fluid during storage or normal use conditions. The term leachable is often erroneously used to describe an extractable. (TR14) (TR26) Leachables are organic and inorganic chemical entities that migrate from a packaging/delivery system, packaging component, or packaging material of construction into an associated drug product under normal conditions of storage and use or during accelerated drug product stability studies. Leachables are typically a subset of extractables or are derived from extractables. (TR54-4) Chemical substances that are leached, from product-contact or non-product-contact materials, under typical process conditions and detected in final dosage. Leachables may be a subset of extractables, and can include their reaction or breakdown products. (TR66) Organic or inorganic chemical entity that migrates from pharmaceutical container closure system components into a drug product formulation. (TR73)
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Use-related Risk Analysis
A systematic assessment of all of the user steps involved in using the device with particular consideration of the potential use errors, their associated clinical consequences along with the risk-mitigation strategies, and the method of validating the risk-mitigation strategies. (TR73)