<unk>  is a heparin antagonist that is FDA approved for the treatment of heparin overdosage. There is a Black Box Warning for this drug as shown here.  Common adverse reactions include bradycardia,flushing, nausea, vomiting and dyspnea,.
Protamine Sulfate
Aminocaproic acid 
Vitamin K
Edetate disodium
Platelet rich plasma
Cryoprecipitate
Fresh frozen plasma
Pentoxyverine