Opioid agonist-antagonist medications for labor are typically used during which stage?

• A. In the latent phase of stage 1 labor
• B. In the early active phase of stage 1 labor when contractions are established and cervix is at least 4 cm
• C. During pushing
• D. Only after delivery

Answer: (D)

Pain relief from opioid agonist-antagonist medications is most appropriate when labor pain becomes significant but the labor process is still progressing. This typically occurs during the active phase of the first stage of labor, when contractions are established and the cervix is about 4 cm dilated. In the latent phase, pain is milder and analgesia is often unnecessary or could slow labor. During pushing, the ability to bear down is crucial and sedation from analgesics can hinder that effort. After delivery, the focus shifts to postpartum pain, not ongoing labor analgesia. These medications thus fit best for active labor when pain is moderate to severe but labor is still underway.