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Protamine

CLASS

  • neutralization of heparin

MECHANISM OF ACTION

  • strongly basic protamine + strongly acid heparin -> forms stable salt -> removed by reticuloendothelial system.
  • inhibits formation and activity of thromboplastin (extrinsic pathway)

PHARMACEUTICS

  • purified mixture of low-molecular weight cationic proteins prepared from fish sperm (salmon).
  • clear, colourless solution
  • 10mg/mL
  • protamine sulphate

DOSE

  • 1mg protamine : 100u heparin
  • reduce dose if more than 15 minutes has elapsed from heparin dose

INDICATIONS

  • heparin reversal
  • LMWH revesal

ADVERSE EFFECTS

  • Hypotension
  • Increased Pulmonary Vascular resistance
  • Anaphylaxis
  • Bleeding
  • Bradycardia

PHARMACOKINETICS

  • Absorption
  • Distribution
  • Metabolism – ?
  • Elimination – t ½ = 60min

CCC Pharmacology Series

Emergency Medicine PharmD — Protamine for LMWH (2013)

Critical Care

Compendium

Chris is an Intensivist and ECMO specialist at The Alfred ICU, where he is Deputy Director (Education). He is a Clinical Adjunct Associate Professor at Monash University, the Lead for the  Clinician Educator Incubator programme, and a CICM First Part Examiner.

He is an internationally recognised Clinician Educator with a passion for helping clinicians learn and for improving the clinical performance of individuals and collectives. He was one of the founders of the FOAM movement (Free Open-Access Medical education) has been recognised for his contributions to education with awards from ANZICS, ANZAHPE, and ACEM.

His one great achievement is being the father of three amazing children.

On Bluesky, he is @precordialthump.bsky.social and on the site that Elon has screwed up, he is @precordialthump.

| INTENSIVE | RAGE | Resuscitology | SMACC

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