Antimicrobial resistance is a public health problem emerging in all areas of the world, making difficult to treat many common infections. Antimicrobial stewardship is an instrument to fight antimicrobial resistance. Antimicrobial stewardship is a set of procedures aimed at saving as many doses of antibiotics as possible to preserve their future efficacy, limiting the selective pressure on world microbial population. It includes those assessments regarding the administration of antibiotics that start from the correct patient’s selection to start antibiotic treatment, to choose the most suitable molecule and the route of administration, collecting microbiological samples to isolate a microorganism and arrive at any modification of narrow-spectrum antibiotic therapy or even discontinuation of the antibiotic.