Pharmacology True about heparin are all of the following except: September 2009 and March 2011 A Powerful anticoagulant only in vivo B Protamine sulfate is the antidote C Not given by intramuscular route D Acts by inhibiting factor Ha and Xa 💡 Explanation True about heparin are all of the following except: September 2009 and March 2011 ✓ Correct Answer: A. Powerful anticoagulant only in vivo