Finish your course of antibiotics. This statement has held true for decades. First started around the time World War II was going on, the belief has persisted. Rooted in the view that the bacteria need to be annihilated and only a complete course can do this, patients have been routinely advised to complete the prescribed course of seven or fourteen-day medication for any ill. On a side note, several patients take antibiotics for something like a common cold which is usually caused by a virus. The side effects can obviously be horrendous. But let's get back to the prescribed antibiotics.
Antibiotics, which means opposing life, by their very nature work to kill bacteria that is attempting to or had already infected your body. Several diseases such as Tuberculosis have been conquered due to the invention of antibiotics. Louis Pasteur was one of the early scientists to observe that "if we could intervene in the antagonism observed between some bacteria, it would offer perhaps the greatest hopes for therapeutics." However, because of their nature to destroy bacteria in your body, they have side effects, in that they affect the rest of your body. Reactions can include allergies, fever, nausea and even very severe allergic reactions and diarrhoea. Antibiotics are also known to result in candida. You are better off not taking antibiotics if you can help it or taking as little of it as is possible.
Researchers in the UK have now found that perhaps it is not necessary to complete a course of antibiotics. In fact, you may be better off with shorter cycles. The recommendation for shorter durations is because antibiotics create resistant strains of the bacteria. Doctors are now increasingly calling for short-course regimes as opposed to the standard two-weeks. Further research is required to validate these findings. Do speak to your Doctor in case he prescribes antibiotics to you, in any case.