Biologically Active Substance
metanephrine
Subclass of:
Epinephrine
Definitions related to metanephrine:
  • A product of the O-methylation of epinephrine by catechol O-methyltransferase, which has no physiologic activity. Increased levels of free metanephrine in patient blood plasma samples may be a diagnostic indicator for pheochromocytoma.
    NCI
    U.S. National Cancer Institute, 2021
  • Product of epinephrine O-methylation. It is a commonly occurring, pharmacologically and physiologically inactive metabolite of epinephrine.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2025
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