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What Doctors Don't Tell You

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May 2020 (Vol. 5 Issue 3)

The myth of completing a course of antibiotics

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The myth of completing a course of antibiotics image

It's one of the most widely held beliefs in medicine—and it's wrong. You don't have to complete a course of antibiotics, new research has found

We're entering the age of the superbug—infections that can't be treated by antibiotics. The superbug has developed because medicine has been handing out these drugs for almost any condition, even if it's an inappropriate use, such as for a viral infection.

The other problem has been medicine's 'golden rule' of always finishing the course of treatment. But new research suggests this is yet another medical myth: patients are told they must finish their antibiotic prescription because they would otherwise increase their resistance to the drug. But the very reverse could be true, say researchers from Brighton and Sussex Medical School in the UK: it's taking antibiotics unnecessarily that increases resistance.

Yes, antibiotics are still lifesavers, but as lead researcher Martin Llewelyn says, the advice to complete a course of antibiotics isn't supported by evidence—and it's encouraging the rise of the 'superbugs' that can't be treated by the drugs.1

The idea is born from a misplaced fear of under-treatment, but when the researchers looked at a range of common infections, they found that antibiotics were effective in around half the time that is routinely prescribed.

For instance, the common ear infection, otitis media, can be successfully treated within five days, and yet the standard treatment time is 10 days. Similarly, the throat infection streptococcal pharyngitis, or 'strep throat,' needs three to six days of treatment, and not the 10 days prescribed. Pneumonia needs just five days of antibiotics, again just half the time that's prescribed.

Doctors also adopt a one-size-fits-all approach to antibiotic prescribing, while the actual necessary treatment time can vary enormously from patient to patient. Antibiotics are a precious and finite resource, and doctors need to learn to change their prescribing habits, the researchers say.

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