When Aspirin Doesn't Work

It's a miracle drug for most, but doctors have discovered something new: aspirin resistance

It seems we are always learning something new and unexpected about the medications we take, and last week the surprise for me was about aspirin. A lot of people, it turns out, are born with--or are developing--a resistance to aspirin. This is not the kind of resistance that drug users build up over time or that bacteria develop against antibiotics, but it is nonetheless important. Aspirin is one of our most commonly used over-the-counter medications and is something of a miracle drug. It can do everything from dull the pain of a headache to reduce--as much as 25%--the risk of a...

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