The Myth of Drug Expiration Dates

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Nelson Vergel

Founder, ExcelMale.com
The idea that drugs expire on specified dates goes back at least a half-century, when the FDA began requiring manufacturers to add this information to the label. The time limits allow the agency to ensure medications work safely and effectively for patients. To determine a new drug’s shelf life, its maker zaps it with intense heat and soaks it with moisture to see how it degrades under stress. It also checks how it breaks down over time. The drug company then proposes an expiration date to the FDA, which reviews the data to ensure it supports the date and approves it. Despite the difference in drugs’ makeup, most “expire” after two or three years.


Cantrell keeps a collection of old bottles of chemicals and medicines. He’s tested some of them and found that they’re still potent. (Sandy Huffaker for ProPublica)
Once a drug is launched, the makers run tests to ensure it continues to be effective up to its labeled expiration date. Since they are not required to check beyond it, most don’t, largely because regulations make it expensive and time-consuming for manufacturers to extend expiration dates, says Yan Wu, an analytical chemist who is part of a focus group at the American Association of Pharmaceutical Scientists that looks at the long-term stability of drugs. Most companies, she says, would rather sell new drugs and develop additional products.

Pharmacists and researchers say there is no economic “win” for drug companies to investigate further. They ring up more sales when medications are tossed as “expired” by hospitals, retail pharmacies and consumers despite retaining their safety and effectiveness.

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