PT - JOURNAL ARTICLE ED - , TI - Intravenous anticoagulants: heparin and ancrod AID - 10.1136/dtb.10.8.29 DP - 1972 Apr 14 TA - Drug and Therapeutics Bulletin PG - 29--30 VI - 10 IP - 8 4099 - http://dtb.bmj.com/content/10/8/29.short 4100 - http://dtb.bmj.com/content/10/8/29.full SO - Drug Ther Bull1972 Apr 14; 10 AB - Much more is known about heparin now than when we discussed it six years ago.1 It is a difficult drug to use, and is frequently prescribed too casually. Another intravenous anticoagulant, arvin, has been developed, and needs to be compared with heparin.