Final answer:
A postpartum client with a fourth-degree perineal laceration would likely be prescribed Methylergonovine (Methergine) to promote uterine contractions and control bleeding.
Step-by-step explanation:
A fourth-degree perineal laceration is a severe tear that involves the perineum and extends all the way to the rectum. This type of laceration often requires surgical repair in addition to medication. One medication that the nurse can expect to be ordered for a postpartum client with a fourth-degree perineal laceration is Methylergonovine (Methergine). Methylergonovine is a medication that helps promote uterine contractions and control bleeding. It can be given to help the uterus return to its pre-pregnancy size and to prevent postpartum hemorrhage.