An inhibitor of tyrosine hydroxylase and therefore a powerful inhibitor of catecholamine synthesis; used for controlling the manifestations of pheochromocytoma, in preoperative preparation, or in instances where surgical resection is contraindicated or incomplete.
metyrosine/me·ty·ro·sine/ (mĕ-ti´ro-sēn) an inhibitor of the first step in catecholamine synthesis, used to control hypertensive attacks in pheochromocytoma.
an inhibitor of tyrosine hydroxylase, the rate-limiting enzyme for catecholamine synthesis.
indications It is prescribed in the treatment of pheochromocytoma before surgery and may be used for long-term therapy if surgery is contraindicated.
contraindication Known hypersensitivity to this drug prohibits its use.
adverse effects Among the more serious adverse effects are extrapyramidal reactions, including tremor and drooling. Sedation is common, and diarrhea and anxiety may occur.
l-tyrosine, an inhibitor of catecholamine synthesis used in the treatment of pheochromocytoma.