Most of us are tempted to stop taking our antibiotics as soon as we start feeling better. Not finishing your course of antibiotics can lead to recurrent infection. That is because the weakest bacteria might have been killed with a shorter course, but the strongest bacteria is still left behind. So, in order to get rid of the infection completely it is necessary to kill all bacteria by taking the complete course recommended by your physician. Failure to take antibiotics as directed can also contribute to antibiotic resistance and cause these very effective drugs to become obsolete.