Kanavit (Phytomenadione)

Kanavit (phytomenadione) acts on the vitamin K‑dependent coagulation pathway to correct deficiencies and counteract anticoagulant effects.

• Vitamin K deficiency bleeding: restores normal clotting by activating clotting factors, reducing hemorrhagic risk.
• Warfarin or other vitamin K antagonist reversal: rapidly re‑establishes coagulation in patients requiring urgent normalization of INR.
• Neonatal prophylaxis (where indicated): provides essential vitamin K to newborns to prevent early‑onset bleeding.

• Phytomenadione serves as a cofactor for the enzyme gamma‑glutamyl carboxylase, enabling the post‑translational carboxylation of glutamic acid residues on clotting factors II, VII, IX and X. This modification converts the factors into their active forms, allowing the intrinsic and extrinsic pathways of the coagulation cascade to proceed and restore hemostasis. By supplying the necessary vitamin K, the drug compensates for deficiencies caused by poor dietary intake, malabsorption, or antagonistic drugs, thereby normalizing prothrombin time and international normalized ratio values.

Phytomenadione may be associated with a range of adverse reactions, varying from mild to severe.

Common Side Effects

• Injection site pain: mild discomfort at the injection site.
• Redness or swelling: localized erythema or edema.
• Nausea: transient gastrointestinal upset.
• Headache: mild to moderate intensity.

Serious or Rare Side Effects

• Anaphylactic reaction: severe allergic response requiring immediate medical attention.
• Hemolysis: rapid destruction of red blood cells.
• Thrombosis: unexpected clot formation in vessels.

When using Kanavit, several safety considerations should be observed to minimize risk and ensure therapeutic effectiveness.

• Assess coagulation status: check baseline INR/PT before administration.
• Monitor for allergic reactions: observe patient for signs of hypersensitivity during and after dosing.
• Use with caution in liver disease: impaired synthesis of clotting factors may affect response.
• Adjust dose in newborns and infants: pediatric dosing requires specialist guidance.
• Avoid in known hypersensitivity to phytomenadione or excipients: discontinue if reaction occurs.
• Store at ambient temperature: keep in original container, protect from moisture and light.

Phytomenadione can influence the activity of several drugs, necessitating careful review of concomitant therapies.

Major Interactions (Avoid)

• Warfarin and other vitamin K antagonists: concurrent use may blunt anticoagulant effect and precipitate clotting.
• High‑dose vitamin K supplements: may cause excessive coagulation and increase thrombosis risk.

Moderate Interactions (Monitor Closely)

• Broad‑spectrum antibiotics (e.g., cephalosporins): may alter gut flora and affect vitamin K levels, requiring INR monitoring.
• Lipid‑lowering agents (e.g., statins): occasional reports of altered vitamin K metabolism, advise periodic coagulation testing.
• Herbal products containing vitamin K (e.g., green leafy extracts): may reduce efficacy of vitamin K antagonists, monitor INR.