Final answer:
Naloxone (Option A) is the drug used to reverse the depressant effects caused by opioids in newborns. It is an opiate antagonist that combats opioid-induced respiratory depression and is critical in cases of overdose.
Step-by-step explanation:
The drug given to reverse the depressant effects caused by opioids in newborns is Naloxone (Option A). Naloxone is an opiate antagonist that does not produce analgesia, euphoria, or respiratory depression in normal individuals, but it effectively reverses opioid-induced respiratory depression. It rapidly precipitates withdrawal in narcotic-dependent individuals and antagonizes the actions of opioids like morphine at all their receptors. Opioid compounds, which include drugs such as heroin, fentanyl, oxycodone, and Vicodin, are known for their analgesic effects as well as their potential to cause respiratory depression which can lead to overdose deaths. The administration of naloxone is critical as it helps the individual wake up and keeps them breathing until further emergency medical treatment can be provided. Despite its effectiveness, naloxone's use is limited by its short duration of action and the necessity for parenteral administration.