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metirosine

n. An antihypertensive drug that inhibits tyrosine hydroxylase.

Wikipedia
Metirosine

Metirosine ( INN and BAN; α-Methyltyrosine, Metyrosine USAN, AMPT) is an antihypertensive drug. It inhibits the enzyme tyrosine hydroxylase and, therefore, catecholamine synthesis, which, as a consequence, depletes the levels of the catecholamines dopamine, adrenaline and noradrenaline in the body.