Eli5 – why do you take antibiotics as a course and not all at once?

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I’ve just started an antibiotics course which is 4 times a day for 10 days and that got me wondering if they would be just as effective if I took them all and why not.

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Anonymous 0 Comments

Antibiotics kill a bunch of bacteria, and then wear off. When they wear off, the most resistant germs survive and can multiply and evolve.

If we repeat the dose, the antibiotics don’t wear off. It’s a lot harder for even the most resistant germs to survive for long enough to multiply, which reduces evolution.

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