A patient asks about the difference between 'use by' and 'expiration date' on their prescription. Which statement is most accurate?
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A
Both terms are interchangeable and mean the drug is unsafe after that date
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B
The expiration date guarantees potency and safety when stored properly; beyond this date, efficacy cannot be assured
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C
Drugs remain fully potent for 5 years beyond the expiration date if refrigerated
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D
Expiration dates apply only to liquid formulations