<prompt> Which drug predisposes to pyloric stenosis in infants -ErythromycinStreptomycinTetracyclineNitrofurantoin  <response>: Ans. is a i.e., Erythromycino Maternal and infant use of erythromycin and other macrolide antibiotics have been reported as riks factors for infantile hypertrophic pyloric stenosis IHPS. 