**Question:** Drug used in heparin overdose management

**Core Concept:** Heparin is a potent anticoagulant, commonly used for preventing and treating blood clots. In case of overdose, it can lead to significant bleeding complications and requires specific management.

**Why the Correct Answer is Right:**

Correct Answer: D. Protamine sulfate

Protamine sulfate is a specific antidote for heparin overdose. It acts as a direct antagonist to heparin, binding to heparin-induced antithrombin complexes and restoring the anticoagulant activity of antithrombin III, ultimately neutralizing the effects of heparin.

**Why Each Wrong Option is Incorrect:**

A. Acetylcysteine (used in acetaminophen overdose): This antidote is not specific to heparin and is ineffective in treating heparin overdose.

B. Platelet aggregation inhibitors (e.g., aspirin or clopidogrel): These drugs are used to prevent platelet aggregation and are not relevant for managing heparin overdose.

C. Prothrombin complex concentrates (used in vitamin K deficiency): These are not specific to heparin and do not neutralize its effects.

D. Protamine sulfate (used in heparin overdose): As mentioned above, this is the correct antidote for heparin overdose, as it counteracts the anticoagulant effect of heparin.

**Clinical Pearl:**

In case of heparin overdose, protamine sulfate is the specific antidote to neutralize its anticoagulant effects. Early recognition and prompt administration of protamine sulfate can prevent severe bleeding complications associated with heparin overdose.