The Food and Drug Administration has been asked by the National Association of Attorneys General to place black box warning labels on prescription pain relievers containing opioids stating that pregnant women may be harming infants. According to a letter sent to FDA Commissioner Marager Hamburg, the use of opioids has been increasing, which has triggered more cases of the condition known as Neonatal Abstinence Syndrome (NAS). These can be dangerous drugs, even to those who are monitored by physicians.