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Definition of Expiration date

Expiration date: The date for a drug estimated for its shelf life with proper storage in sealed containers away from harmful and variable factors like heat and humidity.

The expiration date of a medicine is based on data, called accelerated stability data, from testing by the manufacturer, that show the product will be good for a particular period of time.

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=13708
Last Editorial Review: 6/14/2012

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