NCIt definition : A phenylalanine derivative and an aromatic amino acid decarboxylase inhibitor with
antihypertensive activity. Methyldopa is a prodrug and is metabolized in the central
nervous system. The antihypertensive action of methyldopa seems to be attributable
to its conversion into alpha-methylnorepinephrine, which is a potent alpha-2 adrenergic
agonist that binds to and stimulates potent central inhibitory alpha-2 adrenergic
receptors. This results in a decrease in sympathetic outflow and decreased blood pressure.;