Why should you finish full course of antibiotics?

Finish your anti biotics so all the bacteria is killed. The strongest bacteria are always left at the end always fighting to survive, so finish the prescription to make sure they are destroyed. The infection could come back. We wouldn't want that to happen now would we?

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I agree with the previous respondent, but I'd take it further. If you don't make sure that you kill all of the bacteria in the first try, you run the risk of bacteria developing that are resistant to that type of antibiotic.

I guess you only need one of the little suckers to mutate slightly, or develop a resistance (out of the millions in your infection) - and then you've got yourself an infection that requires a second course of different antibiotics to cure it.

Furthermore, there is only a limited number of different antibiotics available = what if you find yourself with an infection that's no longer affected by available antibiotics. Then what?

Still think the two or three days you saved without having to take 'those darn pills' was worth it now? (That's what I think any time I have to take them at least)