NARM Pharmacology and Medications 1 — Questions and Answers
Question 1: Which medication is commonly used to manage postpartum hemorrhage due to uterine atony?
- Methylergometrine (Methergine)
- Oxytocin (Pitocin) (Correct answer)
- Magnesium sulfate
- Betamethasone
Correct answer: Oxytocin (Pitocin)
Oxytocin is the first-line uterotonic medication used to prevent and treat postpartum hemorrhage, particularly when caused by uterine atony (a boggy, relaxed uterus). It works by stimulating strong, sustained contractions of the uterine muscle, which helps to compress blood vessels and reduce bleeding. Its rapid action and effectiveness make it a critical intervention in managing this obstetric emergency.
Question 2: What is the primary use of magnesium sulfate in obstetric care?
- To induce labor
- To treat preeclampsia and prevent seizures (Correct answer)
- To manage postpartum hemorrhage
- To relieve severe nausea and vomiting in pregnancy
Correct answer: To treat preeclampsia and prevent seizures
Magnesium sulfate is a critical medication in obstetric care primarily used to prevent and treat seizures (eclampsia) in women with severe preeclampsia or eclampsia. It acts as a central nervous system depressant and a vasodilator, helping to stabilize neuronal excitability and reduce blood pressure. While it has other uses, its role in seizure prophylaxis for preeclampsia is paramount.
Question 3: Which of the following is a potential side effect of administering epidural anesthesia during labor?
- Increased risk of postpartum infection
- Elevated blood glucose levels
- Decreased blood pressure (Correct answer)
- Increased uterine contractions
Correct answer: Decreased blood pressure
A common and significant side effect of epidural anesthesia during labor is maternal hypotension, or decreased blood pressure. This occurs because the anesthetic agents can cause vasodilation (widening of blood vessels) in the lower body, leading to a drop in systemic vascular resistance. Midwives and anesthesiologists closely monitor blood pressure and often administer intravenous fluids or vasopressors to manage this potential complication.
Question 4: What is the purpose of administering Rho(D) immunoglobulin (RhoGAM) to a Rh-negative mother after delivery?
- To prevent postpartum hemorrhage
- To prevent the development of Rh incompatibility in future pregnancies (Correct answer)
- To treat fetal distress during labor
- To manage preterm labor
Correct answer: To prevent the development of Rh incompatibility in future pregnancies
Rho(D) immunoglobulin (RhoGAM) is administered to Rh-negative mothers after delivering an Rh-positive baby, or after other events like miscarriage or abortion. Its purpose is to prevent the mother's immune system from developing antibodies against Rh-positive red blood cells. If these antibodies were to form, they could attack the red blood cells of a future Rh-positive fetus, leading to severe complications like hemolytic disease of the newborn.
Question 5: Which medication is commonly used to control nausea and vomiting during pregnancy, especially in cases of hyperemesis gravidarum?
- Diphenhydramine (Benadryl)
- Ondansetron (Zofran) (Correct answer)
- Metformin
- Labetalol
Correct answer: Ondansetron (Zofran)
Ondansetron (Zofran) is an antiemetic medication commonly prescribed to manage severe nausea and vomiting during pregnancy, including hyperemesis gravidarum. It works by blocking serotonin receptors in the brain and gut, which are involved in triggering nausea and vomiting. While other medications exist, ondansetron is often chosen for its effectiveness and relatively favorable safety profile in pregnancy.
NARM Pharmacology and Medications 1
Which medication is commonly used to manage postpartum hemorrhage due to uterine atony?