To help control labor pain and stress, an injection of pain
medication can be given into a vein (intravenous) or into the muscle
(intramuscular). The most common pain medications used are
opioids. Opioids are also known as narcotics. Examples
of opioids include nalbuphine (Nubain), meperidine (Demerol), fentanyl, and
morphine.
An opioid can help you relax between contractions and decrease the
pain but does not take the pain away completely. Opioids make you drowsy for a
short time and can slow your labor. But opioids are less likely than
epidural anesthesia to cause you to have a forceps or
vacuum delivery.1
The most common side effects of opioids include drowsiness, nausea,
and vomiting.
Opioids are usually used well before delivery, because they can
affect a newborn's breathing. Opioids given right before delivery can also make
the baby sleepy and less interested in breast-feeding.