Comparative Pharmacology
Head-to-head clinical analysis: MENADIONE versus MEPHYTON.
Peer-Reviewed Evidence
Head-to-head clinical analysis: MENADIONE versus MEPHYTON.
MENADIONE vs MEPHYTON
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Menadione is a synthetic derivative of vitamin K that serves as a cofactor for the post-translational carboxylation of glutamic acid residues in vitamin K-dependent proteins, including clotting factors (II, VII, IX, X) and anticoagulant proteins (protein C and S). It is converted in the body to menadiol, which is active in the carboxylation reaction.
Phytonadione (vitamin K1) is a cofactor for the hepatic microsomal enzyme gamma-glutamyl carboxylase, which catalyzes the posttranslational carboxylation of glutamic acid residues to gamma-carboxyglutamic acid (Gla) on vitamin K-dependent clotting factors (II, VII, IX, X) and anticoagulant proteins (protein C, protein S). Carboxylation enables calcium-mediated binding to phospholipid membranes, essential for hemostatic activity.
5–10 mg intramuscularly or subcutaneously once daily for up to 3 days; oral dose 2–10 mg daily.
For anticoagulant-induced prothrombin deficiency: 1 to 10 mg orally, intravenously, or subcutaneously. Intravenous administration rate not to exceed 1 mg per minute.
None Documented
None Documented
Clinical Note
moderateMenadione + Deferasirox
"The serum concentration of Deferasirox can be increased when it is combined with Menadione."
Clinical Note
moderateMenadione + Tenofovir disoproxil
"The metabolism of Tenofovir disoproxil can be decreased when combined with Menadione."
Clinical Note
moderateMenadione + Artesunate
"The serum concentration of the active metabolites of Artesunate can be reduced when Artesunate is used in combination with Menadione resulting in a loss in efficacy."
Clinical Note
moderateTerminal elimination half-life: 2–4 hours in adults with normal hepatic function; prolonged in hepatic impairment or neonates.
Terminal elimination half-life is approximately 25-33 hours in adults; clinical reversal of warfarin effect occurs within 6-12 hours following IV administration.
Renal: negligible (<1% unchanged); biliary/fecal: >90% as metabolites, primarily menadiol glucuronide and menadione sulfate.
Primarily hepatic metabolism; minimal renal excretion (<5% unchanged); biliary/fecal excretion of metabolites accounts for ~50%.
Category C
Category C
Vitamin K Supplement
Vitamin K Supplement
Menadione + Clotrimazole
"The metabolism of Clotrimazole can be decreased when combined with Menadione."