Which hormone is most commonly prescribed for a preschool client with idiopathic hypopituitarism?

Growth hormone is the most commonly prescribed hormone for a preschool client with idiopathic hypopituitarism because this condition is characterized by a deficiency in one or more pituitary hormones, primarily impacting growth. In children, the growth hormone is essential for normal physical development as it stimulates growth in tissues and bones, promotes protein synthesis, and influences metabolism.

In cases of hypopituitarism, where the pituitary gland does not produce adequate levels of hormones, administering growth hormone can help manage the condition by promoting growth and development in the affected child. This treatment is crucial for preventing the negative effects of insufficient growth hormone levels, which can lead to growth failure and delayed physical development.

The other hormones listed, such as estrogen, parathormone, and insulin, do not specifically target the growth deficiencies associated with hypopituitarism. Estrogen is typically related to sexual maturation in females rather than growth in early childhood. Parathormone primarily regulates calcium levels in the body and does not have a direct role in growth promotion. Insulin is vital for glucose metabolism but is not related to growth hormone deficiencies. Therefore, growth hormone is specifically chosen to address the growth deficits present in children with idiopathic hypopituitarism.