Master maternal-newborn medications with this free timed practice test of 10 NCLEX pharmacology questions with answers and rationales focused on obstetric and postpartum care.
You’ll work through high-yield OB drugs including magnesium sulfate, epidural analgesia, nifedipine, Rho(D) immune globulin, nalbuphine, oxytocin, enoxaparin, and postpartum antibiotics.
Each question is set to a 2-minute timer so you can practice exam pacing under pressure. Choose your answer, then review the rationale to reinforce the pharmacology and safety reasoning behind it.
When you finish, explore more pharmacology, dosage calculation, and NCLEX practice questions on NurseStudy.net.
All 10 Questions With Answers & Rationales
Prefer to review at your own pace? Every question from the timed quiz above is listed here in full. Read each one, then tap Show Answer & Rationale to check your reasoning.
Question 1: Pharmacology
A client at 40 weeks’ gestation is receiving an IV infusion of magnesium sulfate for severe preeclampsia. Which assessment finding requires the nurse’s immediate action?
- A. Deep tendon reflexes 3+ and blood pressure 150/92
- B. Decreased urine output to 20 mL/hr and respiratory rate 10/min
- C. Fetal heart rate baseline 140 with moderate variability
- D. Client reports flushing and feeling warm
Show Answer & Rationale
Answer: B. Decreased urine output to 20 mL/hr and respiratory rate 10/min
Rationale: The nurse must review pertinent data and recognize toxicity when administering high-risk medications; oliguria and respiratory depression indicate possible magnesium toxicity and require prompt intervention and provider notification.
Question 2: Pharmacology
A client in active labor is receiving an epidural infusion of bupivacaine and fentanyl. Which client assessment should the nurse prioritize to reduce risk potential?
- A. Oral temperature every hour
- B. Blood pressure and fetal heart rate every 5–15 minutes after initiation
- C. Capillary blood glucose before and after the procedure
- D. Urine ketone testing every 4 hours
Show Answer & Rationale
Answer: B. Blood pressure and fetal heart rate every 5–15 minutes after initiation
Rationale: The nurse must monitor for complications related to analgesia; maternal hypotension following epidural placement can compromise uteroplacental perfusion, so frequent monitoring of blood pressure and fetal heart rate is essential.
Question 3: Pharmacology
A postpartum client is prescribed oral ibuprofen and acetaminophen for pain control after a vaginal birth. Which teaching should the nurse provide to promote safe medication use during breastfeeding?
- A. “Avoid taking these medications while breastfeeding because they pass into milk.”
- B. “Take both medications only on an empty stomach to improve absorption.”
- C. “These medications are generally safe as prescribed; monitor for decreased urine output or unusual bleeding.”
- D. “Stop breastfeeding for 24 hours after each dose of acetaminophen.”
Show Answer & Rationale
Answer: C. “These medications are generally safe as prescribed; monitor for decreased urine output or unusual bleeding.”
Rationale: The nurse provides postpartum care and education; ibuprofen and acetaminophen are usually compatible with breastfeeding, but the client should still monitor for adverse effects such as renal issues or abnormal bleeding and report concerns.
Question 4: Pharmacology
A client at 30 weeks’ gestation is receiving nifedipine orally for preterm labor. Which assessment finding indicates that the medication is having an adverse effect?
- A. Blood pressure 88/50 and dizziness when standing
- B. Fetal heart rate baseline 135 with accelerations
- C. Mild flushing of the face and neck
- D. Reports of uterine cramping every 10 minutes
Show Answer & Rationale
Answer: A. Blood pressure 88/50 and dizziness when standing
Rationale: The nurse evaluates the client’s response to medication; significant hypotension and dizziness suggest excessive calcium channel blocker effect, which may reduce uteroplacental perfusion and requires provider notification and possible dose adjustment.
Question 5: Pharmacology
A Rh-negative postpartum client who delivered an Rh-positive infant 48 hours ago has not yet received Rho(D) immune globulin. What is the nurse’s priority action?
- A. Document that the client is outside the window for administration
- B. Administer the medication as prescribed after verifying negative antibody screen
- C. Hold the medication because the client is no longer pregnant
- D. Ask the client to return at her 6-week postpartum visit for the injection
Show Answer & Rationale
Answer: B. Administer the medication as prescribed after verifying negative antibody screen
Rationale: The nurse evaluates orders for appropriateness and timing; Rho(D) immune globulin is most effective when given within 72 hours after birth, so it should be administered promptly after confirming that the client has not already formed antibodies.
Question 6: Pharmacology
A client in early labor receives IV nalbuphine for pain relief. Shortly after administration, the nurse notes respiratory rate 8/min and oxygen saturation 86%. What is the nurse’s best action?
- A. Encourage the client to take deep breaths and continue to monitor
- B. Decrease the nalbuphine dose for the next contraction
- C. Prepare to administer naloxone per protocol and support respirations
- D. Place the client in high-Fowler position and discontinue fetal monitoring
Show Answer & Rationale
Answer: C. Prepare to administer naloxone per protocol and support respirations
Rationale: The nurse must recognize and respond to high-risk medication complications; nalbuphine can cause respiratory depression, and naloxone reverses opioid effects while respiratory support is provided and the provider is notified.
Question 7: Pharmacology
A client at 10 weeks’ gestation is prescribed doxylamine-pyridoxine for nausea and vomiting of pregnancy. Which statement indicates that further teaching is needed?
- A. “I should avoid driving until I know how sleepy this medicine makes me.”
- B. “I will take the medication at bedtime as prescribed.”
- C. “If my symptoms get worse, I will take double the dose without calling the provider.”
- D. “I will contact my provider if I cannot keep fluids down despite this medicine.”
Show Answer & Rationale
Answer: C. “If my symptoms get worse, I will take double the dose without calling the provider.”
Rationale: The nurse educates antepartum clients about medication safety; the client must not increase the dose independently because this can increase sedation and other adverse effects, and changes require provider guidance.
Question 8: Pharmacology
A client in labor receives IV oxytocin. The nurse observes contractions every 2 minutes lasting 75 seconds with reassuring fetal heart rate. The client’s IV bag is nearly empty. What should the nurse do first?
- A. Stop the oxytocin infusion immediately and contact the provider
- B. Increase the oxytocin rate to maintain the contraction pattern
- C. Replace the oxytocin bag with a new one and continue at the current rate per protocol
- D. Flush the IV line with a rapid bolus of normal saline
Show Answer & Rationale
Answer: C. Replace the oxytocin bag with a new one and continue at the current rate per protocol
Rationale: The nurse monitors IV infusions and maintains ordered therapy; with an adequate contraction pattern and reassuring fetus, the oxytocin should be continued at the same rate using a new bag as per protocol, while ongoing monitoring continues.
Question 9: Pharmacology
A postpartum client receiving enoxaparin for venous thromboembolism prophylaxis asks why she needs this medication after a cesarean birth. Which response by the nurse best integrates pharmacology with health promotion?
- A. “This medication helps your uterus contract more effectively.”
- B. “It thins your blood to prevent blood clots that can form after surgery and reduced mobility.”
- C. “It treats any infection that might develop after your surgery.”
- D. “It replaces the blood you lost during delivery.”
Show Answer & Rationale
Answer: B. “It thins your blood to prevent blood clots that can form after surgery and reduced mobility.”
Rationale: The nurse educates about medication purpose and risk reduction; enoxaparin is a low-molecular-weight heparin used to prevent postoperative venous thromboembolism, which is more likely after cesarean birth and limited ambulation.
Question 10: Pharmacology
A breastfeeding client with mastitis is prescribed dicloxacillin. Which instruction should the nurse provide to support both effective treatment and infant health?
- A. “Stop breastfeeding until the antibiotics are completed.”
- B. “Breastfeed or pump frequently from both breasts, including the affected side.”
- C. “Apply ice packs continuously and avoid touching the breast.”
- D. “Discard all milk pumped from the affected breast during treatment.”
Show Answer & Rationale
Answer: B. “Breastfeed or pump frequently from both breasts, including the affected side.”
Rationale: The nurse provides postpartum care and education; continued emptying of both breasts helps resolve infection and maintain milk supply, and dicloxacillin is generally compatible with breastfeeding, so feeding or pumping should continue unless otherwise directed.
NCLEX Pharmacology Practice Tests
Sharpen your medication knowledge with 50 free, timed pharmacology questions — complete with answers and detailed rationales. Work through all five tests to cover the drug classes the NCLEX tests most.
Core Adult Pharmacology
Safe medication administration, adverse effects, and patient teaching basics.
High-Alert Medications
Anticoagulants, insulin, antiepileptics, opioids, and patient safety.
Pediatric, Oncology & OB
Chemotherapy agents, Rh immune globulin, oxytocin, and weight-based dosing.
Pediatric Meds & Controlled Substances
Insulin teaching, digoxin, vancomycin troughs, and safe controlled-substance handling.
Maternity & OB Pharmacology
Magnesium sulfate, epidurals, nifedipine, nalbuphine, and postpartum medications.
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