Which statement is accurate about the antidote for heparin overdose?

Which statement is accurate about the antidote for heparin overdose?

• A. Vitamin K
• B. Fresh frozen plasma
• C. Protamine sulfate
• D. Calcium gluconate

Answer: (C)

When reversing heparin overdose, you need something that directly neutralizes heparin’s activity. Protamine sulfate does just that: it is a positively charged molecule that binds strongly to the negatively charged heparin, forming a stable complex that cancels heparin’s anticoagulant effect. Because of this direct neutralization, protamine sulfate is the standard antidote for heparin overdose, and its effect is based on stopping heparin from inhibiting thrombin and factor Xa. Vitamin K reverses warfarin by restoring vitamin K–dependent clotting factors, so it doesn’t counteract heparin. Calcium gluconate isn’t an antidote for heparin and is used for other electrolyte or overdraft situations. Fresh frozen plasma can provide clotting factors, but it does not specifically neutralize heparin, so it isn’t the targeted reversal for heparin overdose.

When reversing heparin overdose, you need something that directly neutralizes heparin’s activity. Protamine sulfate does just that: it is a positively charged molecule that binds strongly to the negatively charged heparin, forming a stable complex that cancels heparin’s anticoagulant effect. Because of this direct neutralization, protamine sulfate is the standard antidote for heparin overdose, and its effect is based on stopping heparin from inhibiting thrombin and factor Xa.

Vitamin K reverses warfarin by restoring vitamin K–dependent clotting factors, so it doesn’t counteract heparin. Calcium gluconate isn’t an antidote for heparin and is used for other electrolyte or overdraft situations. Fresh frozen plasma can provide clotting factors, but it does not specifically neutralize heparin, so it isn’t the targeted reversal for heparin overdose.