CBC CBC Medications & Substances in Breastfeeding 1 — Questions and Answers
Question 1: Which resource is considered the gold standard for evaluating medication safety during breastfeeding in the US?
- LactMed (NIH database) (Correct answer)
- FDA drug label only
- PDR Physicians' Desk Reference
- WebMD drug guide
Correct answer: LactMed (NIH database)
LactMed, maintained by the National Institutes of Health, is the evidence-based database widely recognized as the gold standard for assessing drug safety in breastfeeding.
Question 2: A breastfeeding mother asks about taking ibuprofen for postpartum pain. What is the most accurate counseling point?
- It is generally considered compatible with breastfeeding due to low transfer into milk (Correct answer)
- It is absolutely contraindicated while breastfeeding
- It transfers in high amounts and should be avoided for 48 hours after each dose
- It requires pumping and dumping for 12 hours after ingestion
Correct answer: It is generally considered compatible with breastfeeding due to low transfer into milk
Ibuprofen has low transfer into breast milk and is generally considered compatible with breastfeeding by major health authorities.
Question 3: Which of the following factors most influences how much of a drug transfers into breast milk?
- Molecular weight, protein binding, and lipid solubility (Correct answer)
- The mother's age and parity
- The infant's birth weight only
- Time of day the medication is taken
Correct answer: Molecular weight, protein binding, and lipid solubility
Molecular weight, protein binding, and lipid solubility are the primary pharmacokinetic properties that determine a drug's transfer into breast milk.
Question 4: What does the term 'Relative Infant Dose (RID)' mean in the context of breastfeeding and medications?
- The infant's dose via milk as a percentage of the maternal weight-adjusted dose (Correct answer)
- The total milligrams of drug excreted per liter of breast milk
- The recommended pediatric dose of a given drug
- The ratio of drug in fore-milk versus hind-milk
Correct answer: The infant's dose via milk as a percentage of the maternal weight-adjusted dose
RID expresses the infant's estimated drug exposure through milk as a percentage of the mother's weight-adjusted therapeutic dose, helping assess safety.
Question 5: Nicotine replacement therapy (NRT) patches are being considered by a breastfeeding mother who wants to quit smoking. What should a CBC counselor communicate?
- NRT is generally preferred over continued smoking because it reduces infant nicotine and toxin exposure (Correct answer)
- NRT is absolutely contraindicated and the mother must stop breastfeeding to use it
- NRT patches transfer no nicotine into breast milk
- The mother should wean immediately before starting NRT
Correct answer: NRT is generally preferred over continued smoking because it reduces infant nicotine and toxin exposure
NRT exposes the infant to less nicotine and eliminates the additional carcinogens found in cigarette smoke, making it preferable to continued smoking for breastfeeding mothers.
Question 6: A mother is prescribed a medication with an RID of 15%. How should a CBC counselor interpret this?
- The RID exceeds the typical 10% safety threshold and warrants further evaluation and monitoring (Correct answer)
- The medication is absolutely safe and no monitoring is needed
- The medication should never be used while breastfeeding
- The RID value is irrelevant if the drug is FDA-approved
Correct answer: The RID exceeds the typical 10% safety threshold and warrants further evaluation and monitoring
An RID above 10% exceeds the commonly accepted safety threshold, indicating the need for further clinical evaluation and possible infant monitoring.
CBC CBC Medications & Substances in Breastfeeding 1
Which resource is considered the gold standard for evaluating medication safety during breastfeeding in the US?