Hypothalamic agents can inhibit or stimulate the release of hormones from the anterior pituitary using hormones or factors. However, not all of these hormones are available for pharmacological use.
The major endocrine organs of the body include the pituitary, thyroid, parathyroid, adrenal, pineal and thymus glands, the pancreas, and the gonads. The regulatory functions of the nervous and endocrine systems are similar in some aspects, but differ in such ways.
Acromegaly is a rare disorder of excessive bone and soft tissue growth due to elevated levels of growth hormone. In young children, prior the completed fusion and growth of bones, excessive growth hormone can cause a similar condition called gigantism.