Final answer:
For a school-age child with hypopituitarism, Human Growth Hormone (GH) is typically prescribed to stimulate growth as it is one of the pituitary hormones that may be deficient.
Step-by-step explanation:
The condition known as hypopituitarism is characterized by a deficiency in one or more of the pituitary hormones. In the case of a school-age child, the nurse can expect that the provider may prescribe Human Growth Hormone (GH), which stimulates cellular activities like protein synthesis and promotes growth. The anterior pituitary gland produces GH, which is crucial for normal physical growth in children. Other hormones like Vasopressin and Levothyroxine have different functions, such as regulating blood pressure and thyroid function, respectively. Methylphenidate is a medication used for attention deficit hyperactivity disorder (ADHD) and is not related to hypopituitarism treatment.