Table of Contents

COMPARISON OF FORMULARY LOW MOLECULAR WEIGHT HEPARINS and FONDAPARINUX

Drug Dalteparin  (
Fragmin®)
Enoxaparin 
(Lovenox®)
Fondaparinux (Arixtra®)

Indications & Dose
 

     Prophylaxis of DVT/PE



≤ 40 kg: 2500 units SC daily


> 40 kg: 5000 units SC daily

 



30mg SC Q12H (major ortho trauma or spinal cord injury



2.5 mg SC daily3

     Treatment of DVT/PE
 

 

200 units/kg SC daily2

 

 

1mg/kg SC Q12H1,2

 OR

1.5mg/kg SC daily1,2

 


5-10 mg SC daily3

(dependent on weight)

 


     Acute Coronary
     Syndrome (ACS)

 

-


1mg/kg SC Q12H2

 


2.5 mg SC daily3

 
 

Peak Onset (SC)

 

 

4 hours

 

3 hours

 

2 hours

 

Anti Xa:lla Ratio

 

 

2-2.7:1

 

2.7-4.1:1

 

Pure Anti-Xa

 

Plasma Half-Life
(anti-Xa activity)

 

 

2-2.3 hours

 

3.5-4.2 hours

 

17-21 hours

 

 

Elimination

 

 

renal

 

renal

 

renal

 

When to Hold SC Dose Prior to Surgery

 

Q24H Treatment dose:

at least 24 hrs4,5

 

Prophylaxis: at least 12 hrs

 

Q12H Treatment dose:

at least 12 hrs4,5

 

Prophylaxis: at least 12 hrs

 

Treatment dose:

at least 48 hrs

Prophylaxis:
at least 24 hrs

1 non-formulary indication at Vancouver Acute

2 the manufacturer recommends a maximum dose of dalteparin 18,000 units/day and enoxaparin 1
  80 mg/day or 100 mg Q12H; however, dosage should be individualized and higher dosages may
  be administered for obese patients

3 formulary for unstable angina/non-ST elevation myocardial infarction, and patients with HIT

 

4 for Q24H treatment dose, Chest 2008 recommends give only 50% of daily dose 24hr preop

5 for Q12H  treatment dose, Chest 2008 recommends omit last dose 12 hours preop