Final answer:
Infantile hypertrophic pyloric stenosis has been associated with the antibiotic erythromycin in infants under one month old. Erythromycin is part of the macrolides class of antibiotics and can affect gastrointestinal motility. Vitamin D, while essential for preventing rickets by ensuring proper absorption of calcium, is not linked to pyloric stenosis.
Step-by-step explanation:
Infantile hypertrophic pyloric stenosis (IHPS) has been reported in infants younger than 1 month treated with erythromycin. This condition is a form of gastric outlet obstruction, where the muscle at the pylorus becomes abnormally thick, making it difficult for food to pass from the stomach into the duodenum. Erythromycin is known to influence motility within the gastrointestinal tract, which might be related to the development of this condition in infants exposed to the antibiotic.
It is important to note that erythromycin belongs to the macrolides class of antibiotics, which can be prescribed to infants for various bacterial infections. In contrast, other options provided, such as Vitamin D, Ibuprofen, and Corticosteroids, have not been commonly associated with causing IHPS. While Vitamin D is crucial in preventing rickets, a disease resulting from the malabsorption of calcium and deficiency of this vitamin, it is not related to the development of pyloric stenosis.