VTE Flashcards
Unfractionated Heparin Abbreviation
UFH
Unfractionated Heparin Dosing
Weight based: 80 units/kg IV bolus, 18 units/kg/hr infusion
Unfractionated Heparin Side Effects
Major bleeding Osteoporosis (if long term) Hypersensitivity HIT HAT
Unfractionated Heparin Monitoring
aPTT: Baseline, 6 hours after dose or dose change (x24h), daily after 1st day
Platelet: QOD until day 14
Enoxaparin Brand
Lovenox
Enoxaparin Dosing
Prophylaxis: 30mg SQ q12h OR 40mg SQ daily
Treatment (actual body weight): 1mg/kg SQ q12h OR 1.5mg/kg SQ daily
If CrCl is less than 30ml/min:
Prophylaxis: 30mg SQ daily
Treatment: 1mg/kg SQ daily
Enoxaparin Side Effects
Black box warning: Do NOT use with neural anesthesia/spinal puncture
Bleeding
Thrombocytopenia (less than UFH)
Delayed HS skin reactions
Enoxaparin Monitoring
If CrCl less than 30mL/min (severe kidney failure), children, obesity, long courses, pregnancy, monitor anti-Xa level 4-6h post.
Dalteparin Brand
Fragmin
Dalteparin Dosing
Prophylaxis: 2500-5000 IU SQ daily
Treatment: 200 IU/kg SQ daily (MAX 18000 IU)
Dalteparin Side Effects
Black box warning: Do NOT use with neural anesthesia/spinal puncture
Bleeding
Thrombocytopenia (less than UFH)
Delayed HS skin reactions
Dalteparin Monitoring
If CrCl less than 30mL/min (severe kidney failure), children, obesity, long courses, pregnancy, monitor anti-Xa level 4-6h post.
Tinzaparin Brand
Innohep
Tinzaparin Dosing
Treatment: 175 anti-Xa IU/kg SQ daily
Tinzaparin Side Effects
Black box warning: Do NOT use with neural anesthesia/spinal puncture
Bleeding
Thrombocytopenia (less than UFH)
Delayed HS skin reactions
Tinzaparin Monitoring
If CrCl less than 30mL/min (severe kidney failure), children, obesity, long courses, pregnancy, monitor anti-Xa level 4-6h post.
Fondaparinux Brand
Arixtra
Fondaparinux Dosing
Prophylaxis: 2.5mg SQ daily (not for less than 50 kg or CrCl less than 30ml/min) Treatment: Less than 50: 5mg SQ daily 50-100kg: 7.5mg SQ daily Greater than 100kg: 10mg SQ daily
Fondaparinux Side Effects
Bleeding
Fondaparinux Monitoring
Can monitor anti-Xa levels, but no routine monitoring
Rivaroxaban Brand
Xarelto
Rivaroxaban Dosing
DVT prophylaxis: 10mg PO daily 12-35 days
DVT/PE treatment: 15mg PO BID x3 weeks, then 20mg daily
NV Atrial fibrillation:
20mg PO daily
Rivaroxaban Side Effects
Bleeding
Black box warning: spinal/epidural hematoma and premature D/C increases risk thrombotic event
Rivaroxaban Monitoring
Caution with CYP3A4/P-gp
Edoxaban Brand
Savaysa
Edoxaban Dosing
DVT/PE treatment (after 5-10 days parenteral therapy): 60mg PO daily if CrCl is greater than 50 mL/min
30mg PO daily if CrCl 15-50 mL/min, body weight less than or equal to 60kg
NV atrial fibrillation:
60mg PO QD if CrCl 50-95 mL/min
30mg PO QD if CrCl 15-50 mL/min
Edoxaban Side Effects
Bleeding
Black box warning: spinal/epidural hematomas, premature discontinuation increases risk thrombotic event
Less efficacy in NVAF patient CrCl is greater than 95 mL/min