Antibiotic education leaflet. Medical leaflet promoting restraint over the use of antibiotics. Antibiotic-resistant bacteria such as MRSA (methicillin-resistant Staphylococcus aureus) have developed partly as a result of these antibacterial drugs being over-prescribed and incorrectly used. For example, taking antibiotics for coughs, colds and sore throats, which are mainly caused by viruses, has little effect.