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Protamine sulfate

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Title: Protamine sulfate  
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Subject: Protamine, Antidote, Cardiopulmonary bypass, Antidotes, Prednisolone/promethazine
Collection: Antidotes
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Protamine sulfate

Protamine sulfate is a drug that reverses the anticoagulant effects of heparin by binding to it.

health system.[1]


  • Medical uses 1
    • Dosage 1.1
    • Adverse effects 1.2
  • References 2
  • External links 3

Medical uses

Protamine sulfate is usually administered to reverse the large dose of heparin administered during certain surgeries, especially heart surgery. A dose of protamine is given when the patient is off - pump, when extracorporeal circulation and anticoagulation are no longer needed.

It is also used in gene transfer, protein purification and in tissue cultures as a crosslinker for viral transduction.

In gene therapy, protamine sulfate has been studied as a means to increase transduction rates by both viral[2] and nonviral (e.g. utilizing cationic lipids)[3] mediated delivery mechanisms.


Dosage for heparin reversal is 1.0 -to- 1.5 mg protamine sulfate IV for every 100 IU of active heparin, not to exceed 50 mg. PTT should be monitored at 5–15 minutes after dose then in 2–8 hours afterward.

Adverse effects

Protamine has been reported to cause allergic reactions in patients who are allergic to fish, diabetics using insulin preparations containing protamine, and vasectomized or infertile men. [4] [5] These reactions may manifest as urticaria, hypotension, pulmonary hypertension, bronchoconstriction, facial numbness, and cardiovascular collapse [6] and occur at rates ranging from 0.28% to 6%. [5] [7]

Non-IgE-mediated anaphylactoid reactions to protamine sulfate are more common than IgE-mediated anaphylaxis. [6]

Avoiding rapid infusion of protamine sulfate and pre-treating at-risk patients with histamine receptor antagonists (H1 and H2) and steroids may minimize these reactions. A 5-10 mg test dose is recommended following pretreatment before administering the full dose. [5]


  1. ^ "WHO Model List of EssentialMedicines" (PDF). World Health Organization. October 2013. Retrieved 22 April 2014. 
  2. ^ Kenneth Cornetta; W.French Anderson (1989). "Protamine sulfate as an effective alternative to polybrene in retroviral-mediated gene-transfer: implications for human gene therapy". Journal of Virological Methods 23 (2): 187–194.  
  3. ^ Sorgi, FL; Bhattacharya, S; Huang, L (Sep 1997). "Protamine sulfate enhances lipid-mediated gene transfer." (PDF). Gene therapy 4 (9): 961–8.  
  4. ^ Walker, WS; Reid, KG; Hider, CF; Davidson, IA; Boulton, FE. (1984). "Successful cardiopulmonary bypass in diabetics with anaphylactoid reactions to protamine.". Br Heart J 52: 112–114.  
  5. ^ a b c Campbell, FW; Goldstein, MF; Atkins, PC. (1984). "Management of the patient with protamine hypersensitivity for cardiac surgery.". Anesthesiology 61: 761–764.  
  6. ^ a b Lee, CH; Cheng, HC; Ko, LW . (2013). "Successful Treatment of Anaphylactic Shock after Protamine Administration-Report of a Case.". Emergency Med 3: 157.  
  7. ^ Welsby, IJ; Newman, MF; Phillips-Bute, B; Messier, RH; Kakkis, ED. (2005). "Hemodynamic changes after protamine administration: association with mortality after coronary artery bypass surgery.". Anesthesiology 102: 308–314.  

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