Use dihydroergotamine exactly as directed. Do not use more or less of it or use it more often than prescribed by your doctor. Dihydroergotamine can damage the heart and other organs if it is used too often. Dihydroergotamine should be used only to treat a migraine that is in progress.
The posterior pituitary is often termed the neurohypophysis because the hormones of this part of the pituitary are released directly from the axonal endings of their source neurons into the circulation (Figure 2.1).
1 The anterior pituitary or adenohypophysis is a classical gland composed predominantly of cells that secrete protein hormones. 2  The posterior pituitary or neurohypophysis is not a separate organ, but an extension of the hypothalamus.hese hypothalamic hormones reach the anterior pituitary through the following route: 1  A branch of the hypophyseal artery ramifies into a capillary bed in the lower hypothalamus, and hypothalmic hormones destined for the anterior pituitary are secreted into that capillary blood.