Administration of protamine to a patient who has not received heparin can result in which effect?

Administration of protamine to a patient who has not received heparin can result in which effect?

• A. Anticoagulation
• B. Hypercoagulation
• C. Profound bradycardia
• D. Seizure

Answer: (A)

Protamine sulfate is the antidote used to reverse heparin’s anticoagulant effects. When it is given to someone who has not actually received heparin, it can itself interfere with the coagulation system, producing a temporary anticoagulant state. This can manifest as a tendency to bleed because protamine may disrupt platelet function or affect calcium-dependent steps in clotting, altering thrombin generation even in the absence of heparin. So, the net result can be anticoagulation rather than restoration of normal clotting. Note that while protamine can cause notable reactions such as fast infusion–related bradycardia or hypotension and rare anaphylactoid responses, the question’s focus is the coagulation effect in a patient without prior heparin exposure, which is a tendency toward anticoagulation.

Protamine sulfate is the antidote used to reverse heparin’s anticoagulant effects. When it is given to someone who has not actually received heparin, it can itself interfere with the coagulation system, producing a temporary anticoagulant state. This can manifest as a tendency to bleed because protamine may disrupt platelet function or affect calcium-dependent steps in clotting, altering thrombin generation even in the absence of heparin. So, the net result can be anticoagulation rather than restoration of normal clotting.

Note that while protamine can cause notable reactions such as fast infusion–related bradycardia or hypotension and rare anaphylactoid responses, the question’s focus is the coagulation effect in a patient without prior heparin exposure, which is a tendency toward anticoagulation.