Antibiotics are among the most commonly prescribed medications for children in the United States, but new research shows that they sometimes cause more harm than good. A study supported by the Centers for Disease Control and Prevention (CDC) ... used nationwide estimates for outpatient antibiotic prescriptions and data from a nationally representative sample of emergency room visits [to look] at the use of antibiotics by those under the age of 19. From 2011-2015, reactions and other side effects from antibiotics led to an estimated 70,000 ER visits each year. Most visits, 86 percent, were for allergic reactions which ranged from mild, the most common (rash, itching) to moderate and severe (anaphylaxis, angioedema, severe swelling beneath the skin). The risk of an ER visit also varied by the child's age and the type of antibiotic. Children aged 2 or younger carried the highest risk of a side effect, with 41 percent of visits involving children in this age group. Amoxicillin, Amoxicillin and sulfamethoxazole/trimethoprim, both commonly prescribed antibiotics, were the most implicated in side effects among children aged 9 or younger and 10-19, respectively. Nearly a third, if not more, of outpatient pediatric prescriptions for antibiotics, are unnecessary, according to the CDC. A recent study showed that 78 percent of parents did not recall any discussions of possible antibiotic harms during their child's last doctor visit.