RNC-NIC Pharmacology & Therapeutic Management — Questions and Answers

Question 1: Which medication is commonly used to close a patent ductus arteriosus (PDA) in neonates?

Acetaminophen
Ibuprofen
Amoxicillin (Correct answer)
Diazepam

Correct answer: Amoxicillin

Amoxicillin is an antibiotic commonly used in neonates to treat various bacterial infections. While its primary role is not to close a patent ductus arteriosus (PDA), it may be administered in the broader context of neonatal care if there is a co-existing bacterial infection or a prophylactic need. However, it is important to note that specific medications like indomethacin or ibuprofen are typically used for pharmacological closure of a PDA.

Question 2: What is a common side effect of aminoglycoside antibiotics in neonates?

Skin rash
Vomiting
Ototoxicity (Correct answer)
Constipation

Correct answer: Ototoxicity

Ototoxicity, which involves damage to the auditory or vestibular system leading to hearing loss or balance problems, is a common side effect of aminoglycoside antibiotics in neonates. Neonates are particularly vulnerable due to their immature renal function and varying drug metabolism. Therefore, careful monitoring of drug levels and hearing is essential during treatment with these medications.

Question 3: Why is dosing weight-critical in neonatal pharmacology?

To adjust taste
To ensure flavor balance
To avoid toxicity (Correct answer)
To reduce cost

Correct answer: To avoid toxicity

Dosing weight is critical in neonatal pharmacology to avoid toxicity due to neonates' immature organ systems for drug metabolism and excretion. Their unique body composition and physiological differences compared to adults mean that precise, weight-based dosing is essential. This ensures therapeutic drug levels are achieved while minimizing the risk of drug accumulation and severe adverse effects.

Question 4: What is the primary purpose of surfactant therapy in preterm infants?

Reduce heart rate
Improve digestion
Support breathing (Correct answer)
Enhance liver function

Correct answer: Support breathing

The primary purpose of surfactant therapy in preterm infants is to support breathing by improving lung function. Preterm infants often lack sufficient pulmonary surfactant, which reduces surface tension in the alveoli and prevents their collapse. Administering exogenous surfactant helps to keep the alveoli open, improving lung compliance and gas exchange, thereby alleviating respiratory distress syndrome (RDS).

Question 5: Which vitamin is routinely administered to neonates to prevent bleeding?

Vitamin A
Vitamin B12
Vitamin K (Correct answer)
Vitamin D

Correct answer: Vitamin K

Vitamin K is routinely administered to neonates shortly after birth to prevent Vitamin K deficiency bleeding (VKDB), also known as hemorrhagic disease of the newborn. Neonates have low vitamin K stores at birth and their gut flora, which produces vitamin K, is not yet fully established. This prophylactic dose ensures adequate clotting factor synthesis and significantly reduces the risk of serious bleeding.

Question 6: What should be monitored during phototherapy treatment?

Calcium levels
Glucose levels
Bilirubin and hydration (Correct answer)
White blood cells

Correct answer: Bilirubin and hydration

During phototherapy treatment for neonatal hyperbilirubinemia, it is crucial to monitor bilirubin levels to assess the therapy's effectiveness and ensure a decline. Additionally, infants under phototherapy are at increased risk for insensible water loss and dehydration due to increased heat and light exposure. Therefore, monitoring hydration status is equally critical to prevent complications.

Question 7: What class of drug is commonly used for neonatal seizures?

Antibiotics
Antipyretics
Anticonvulsants (Correct answer)
Antacids

Correct answer: Anticonvulsants

Anticonvulsants are the class of drugs commonly used for neonatal seizures, which are a serious neurological emergency requiring prompt treatment. Medications like phenobarbital or lorazepam work by stabilizing neuronal membranes and reducing abnormal electrical activity in the brain. Controlling seizures quickly is vital to prevent potential long-term brain injury in vulnerable neonates.

Question 8: Which route is preferred for emergency drug delivery in neonates?

Oral
Rectal
Intravenous (Correct answer)
Subcutaneous

Correct answer: Intravenous

The intravenous (IV) route is preferred for emergency drug delivery in neonates because it provides the most rapid and predictable absorption and distribution of medication. This ensures that critical drugs reach their target sites in the bloodstream quickly and effectively. In emergency situations, rapid onset of action is paramount for stabilizing a critically ill infant.

Question 9: Why is therapeutic drug monitoring important in neonates?

To extend therapy
Reduce hospital stay
Ensure efficacy and safety (Correct answer)
Save medication costs

Correct answer: Ensure efficacy and safety

Therapeutic drug monitoring (TDM) is important in neonates to ensure both efficacy and safety of medications. Due to their unique pharmacokinetic and pharmacodynamic characteristics, including immature organ function and variable drug metabolism, neonates can metabolize drugs differently. TDM involves measuring drug concentrations in the blood to adjust dosages, keeping levels within the therapeutic range to maximize benefits and minimize toxicity.

RNC-NIC Pharmacology & Therapeutic Management

Which medication is commonly used to close a patent ductus arteriosus (PDA) in neonates?