A 3-week-old male infant is brought to the pediatrician by his parents for projectile vomiting after every feed for the past 5 days. The vomitus is non-bilious, and the infant appears hungry after each episode. On examination, the baby has dry mucous membranes, visible peristaltic waves, and a palpable olive-shaped mass in the right upper quadrant. Upon further history, the parents reveal that the infant was treated with erythromycin for pertussis prophylaxis in the first week of life. Which of the following statements regarding macrolide exposure and infantile hypertrophic pyloric stenosis (IHPS) is correct?
