The study was published <br />in the medical journal, The BMJ. 15 million antibiotic <br />prescriptions from <br />2016 were analyzed. Study authors <br />found that 25% of the <br />prescriptions were unnecessary.<br />The most common conditions <br />that were prescribed such <br />antibiotics included acute bronchitis, upper respiratory infections and coughing. <br />These conditions are caused <br />by viruses — not bacteria — <br />which means that antibiotics <br />are useless in treating them.