A 3-week-old in the ED shows fussiness and watery stools. What should be the priority?

Identifying the type of formula the caregiver uses is crucial in this scenario because the infant is very young and exhibiting signs such as fussiness and watery stools, which could indicate a possible intolerance or allergy related to the formula. Infants at this age are often fed formula, and there are various types that can affect bowel habits and lead to gastrointestinal symptoms. By understanding what the infant is consuming, healthcare providers can assess whether a particular ingredient or component in the formula could be contributing to the symptoms observed.

Moreover, different formulas have different compositions, and certain ingredients may lead to digestive issues in some infants. For instance, if the infant is on a cow's milk-based formula, this could raise suspicion for cow's milk protein allergy, which is common in this age group. This information will also assist in determining whether a different feeding strategy or intervention is necessary for the infant's care and how to manage their symptoms effectively.

Taking this step provides valuable insights that guide further assessment and management, ensuring that the approach to care is tailored specifically to the needs of the infant.