**Core Concept**
Fibrinolysis is a process of breaking down fibrin clots in the body. Fibrinolytic agents, such as tissue plasminogen activator (tPA), are used to dissolve clots in conditions like ischemic stroke and pulmonary embolism. However, excessive fibrinolysis can lead to bleeding complications. Therefore, an antidote is required to reverse the effects of fibrinolytics.

**Why the Correct Answer is Right**
The correct antidote for fibrinolytics is tranexamic acid (TXA). TXA works by inhibiting the activation of plasminogen to plasmin, which is the enzyme responsible for breaking down fibrin clots. By inhibiting this process, TXA reduces the risk of bleeding complications associated with fibrinolytic therapy. TXA is a synthetic analog of the amino acid lysine, which binds to plasminogen and prevents its activation to plasmin.

**Why Each Wrong Option is Incorrect**
**Option A:** Protamine is used as an antidote for heparin, not fibrinolytics.
**Option B:** Vitamin K is used to reverse the effects of warfarin, a different type of anticoagulant.
**Option C:** Prolamine is a synthetic polypeptide but is not used as an antidote for fibrinolytics.

**Clinical Pearl / High-Yield Fact**
TXA is also used to reduce bleeding in patients undergoing surgery, such as cardiac surgery and orthopedic surgery.

**Correct Answer:** D. Tranexamic acid