Growth hormone deficiency (GHD) is a type of clinical syndrome that can manifest as isolated or linked with other pituitary hormone deficiencies. Growth hormone 180 min test helps diagnose growth hormone deficiency. It helps to replace growth hormone in case of deficiency or reduce the dose in case of excess. To analyse whether dopamine (DA) has a central stimulating activity on GH secretion in patients with acromegaly, as it does in normal individuals.