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Why do drugs have expiration dates?
I keep a bottle of A.S.A (aspirin) in my desk drawer at work for those rare days when I need to quell a headache. I've long since passed the expiration date on the bottle yet they seem to still take care of that headache. So what is it that "goes bad" in an aspiring after a long period of time? I would think that the ASA in the tablet is still there and will still be there forever. Does the chemical act with the air and deteriorate?
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Henri
Owned for 21 years: '87 Carrera coupe Venetian blue
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