Agent	Clinical trial treatment doses (anti-Xa units)	Average molecular weight (Da)	Intravenous half-life (minutes)	Cost*
Ardeparin (Normiflo)†	Not evaluated	6,000	200	$154.50‡
Dalteparin (Fragmin)†	100 U per kg twice daily	5,000	119 to 139	63.00§
Enoxaparin (Lovenox)†	100 U per kg twice daily	4,500	129 to 180	78.50
Nadroparin (Fraxiparine)	225 U per kg twice daily	4,500	132 to 162	NA
Reviparin (Clivarine)	100 U per kg twice daily	4,300	NA	NA
Tinzaparin (Logiparin, Innohep)	175 U per kg once daily	4,900	111	NA
Danaparoid ∥ (Orgaran)	750 U twice daily	5,500	24 hours	237.00§