Drug		Dosage*	Comments
Unfractionated heparin		5,000-U bolus (or 80 U per kg) IV, 1,300 U (or 18 U per kg) per hour IV	Monitor activated partial thromboplastin time; in heparin resistance, target anti-Xa level of 0.4 to 0.7 U per mL
Low-molecular-weight heparin
	Enoxaparin (Lovenox)	1 mg per kg SC every 12 hours	For all: when monitoring is required, target anti-Xa level of 0.4 to 0.7 U per mL
	Dalteparin (Fragmin)†	100 anti-Xa U per kg SC every 12 hours
	Ardeparin (Normiflo)†	?
Heparinoid
	Danaparoid (Orgaran)†	2,500-U bolus IV; then 400 U per hour IV for 4 hours; then 300 U per hour IV for 4 hours; then 200 U per hour IV	Use for heparin-induced thrombocytopenia; target anti-Xa level of 0.5 to 0.8 U per mL
		When giving SC, 20 U per kg every 12 hours