[How and when to prescribe systemic antibiotics?].

The use and prescription of antibiotics is getting everyday more and more complex for the general practitioner. Nowadays, due to the increasing number of antibiotics, it is necessary to know the patient's medical history, as well as be knowledgeable in bacteriology, pharmacology and toxicology, immunology and infectiology. It is important to determine the administration mode, the dosage and length of the antibiotic treatment, to get maximum effectiveness, while being aware of the possible drug interactions.