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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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Lyophilization
Visible Particle Range
Particulate matter sized above the visible particle 70% probability of detection threshold are con­sidered in the visible range, typically >100-150 μm. (TR79)

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Ready-To-Use
A marketing term often used to describe the benefits of single-use technology or SUS. This designation has no regulatory or scientific basis supporting suitability for use and the end user is responsible to evaluate and determine if appropriate quality requirements are met for their application. (TR66) Washed and sterilized components supplied in a package suitable for transfer into an aseptic processing area and used with sterile injectable products without further processing. (TR85)

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Excipient
A component of a drug formulation that has no active pharmacologic function. Excipients are commonly used in drug formulations as modulators of pH or osmolality for parenteral administration and as stabilizers for APIs. (TR54-4) An ingredient added intentionally to the drug substance that should not have pharmacological properties in the quantity used. (TR57) Inactive pharmaceutical ingredients in a product formulation that are responsible for the product’s manufacturability and physicochemical attributes. (TR67) (TR88)

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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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