<prompt> Metyrosin is used in ?AcromegalyCushing syndromeAddisons diseasePheochromocytoma  <response>: Ans: D PheochromocytomaRef: KDT 7e p. 128, 129; Katzung rlthe p. g4lRate limiting step tyrosine hydrorylation in synthesis of epinephrine is inhibited by metyrosine. 