Final answer:
Protamine sulfate is the antidote for Heparin.
Step-by-step explanation:
The antidote for Heparin is Protamine sulfate. When administered, Protamine sulfate binds to Heparin and forms a stable complex that neutralizes the anticoagulant effects of Heparin. This is because Protamine sulfate is a positively charged molecule that attracts and binds to the negatively charged Heparin.