Final answer:
Meperidine (Demerol) should be avoided because it may cause respiratory depression in the newborn if administered shortly before delivery.
Step-by-step explanation:
Among the medication options presented, Meperidine (Demerol) should be avoided as it may cause respiratory depression in the newborn if given to the mother shortly before delivery. Meperidine is an opioid analgesic, and opioids are known for their potential to cause respiratory depression, which could translate to the infant if the drug crosses the placental barrier close to the time of birth. On the other hand, Naloxone (Narcan) is actually an opioid antagonist commonly used to reverse opioid effects, including respiratory depression, and Naloxone does not pose a risk of respiratory depression to the newborn and is not the medication to avoid for this particular concern. The distinction lies in the opposing actions of Meperidine and Naloxone on opioid receptors.