A nurse is caring for a client who has thrombophlebitis and is receiving a continuous heparin infusion. Which of the following medications should the nurse have available to reverse heparin's effects?

A. Acetylcysteine: Acetylcysteine is used to treat acetaminophen overdose and to help with respiratory conditions such as chronic obstructive pulmonary disease (COPD). It is not used to reverse the effects of heparin. B. Protamine sulfate: Protamine sulfate is the correct antidote for heparin overdose or to reverse the effects of heparin. It works by binding to heparin and neutralizing its anticoagulant effects. C. Deferasirox: Deferasirox is used to treat iron overload, particularly in conditions like thalassemia. It is not used for reversing the effects of heparin. D. Vitamin K: Vitamin K is the antidote for anticoagulants like warfarin, not for heparin. It helps to promote the clotting process but does not affect heparin’s action.