Anticoagulant Therapy Flashcards
enoxaparin (Lovenox) Use
Prophylaxis & DVT treatment
enoxaparin (Lovenox) Action
DIRECT: potentiates action of antithrombin & inactivates factor Xa
enoxaparin (Lovenox) Onset
unknown
enoxaparin (Lovenox) Duration (after discontinued)
24 hours
enoxaparin (Lovenox) Treatment
Usually short term
enoxaparin (Lovenox) Route
Subcutaneous (SQ)
enoxaparin (Lovenox) Lab Test
Not required
enoxaparin (Lovenox) Normal Times
N/A
enoxaparin (Lovenox) Therapeutic Levels
N/A
enoxaparin (Lovenox) Adverse Effects
Bleeding, heparin-induced thrombocytopenia (HIT, 25%)
enoxaparin (Lovenox) Antidote
Protamine Sulfate
heparin Use
VTE (PE & DVT) treatment. Prevents worsening, no effect on existing clots.
heparin Action
INDIRECT: Enhances inh. Fx of anti-thrombin III, prevents activation of clotting factors
heparin Onset
SQ = Rapid: 20-60 min; IV = immediate
heparin Duration
SQ = 12-24 hrs; IV = 2-6 hrs
heparin Treatment
PRN
heparin Route
SQ or IV
heparin Lab Test
PTT (Partial Thromboplastin Time)
heparin Normal Times
PTT 30-40 sec
heparin Therapeutic Levels
PTT: 1.5-2.5 times normal
heparin Adverse Effects
Bleeding, HIT
heparin Antidote
Protamine Sulfate
warfarin (Coumadin) Use
Prophylaxis & VTE (PE/DVT) treatment; stroke prevention in PTs w/ AF or cardiac valve replacement
warfarin (Coumadin) Action
Vit K Antagonist: interferes w/ hepatic synth. of Vit K depend. clotting factors II, VII, IX, X
warfarin (Coumadin) Onset
Delayed: 2-5 days
warfarin (Coumadin) Treatment
Short term or years
warfarin (Coumadin) Route
PO
warfarin (Coumadin) Lab Test
PT/INR
warfarin (Coumadin) Normal Times
PT 11-25.5 sec; INR 0.8-1.1 (a ratio)
warfarin (Coumadin) Therapeutic Levels
PT 1.5-2 times normal values; INR 2-3
warfarin (Coumadin) Adverse Effects
Bleeding & acute renal failure
warfarin (Coumadin) Antidote
Vitamin K
rivaroxaban (Xarelto) & apixaban (Eliquis) Use
Stroke prevention & embolism non-valve related AF
rivaroxaban (Xarelto) & apixaban (Eliquis) Action
Inactivates coagulation factor Xa; inhibiting clotting
rivaroxaban (Xarelto) & apixaban (Eliquis) Onset
1-3 hours
rivaroxaban (Xarelto) & apixaban (Eliquis) Duration
12-14 hours
rivaroxaban (Xarelto) & apixaban (Eliquis) Treatment
Years
rivaroxaban (Xarelto) & apixaban (Eliquis) Route
PO
rivaroxaban (Xarelto) & apixaban (Eliquis) Lab Test
creatinine clearance
rivaroxaban (Xarelto) & apixaban (Eliquis) Normal Times
N/A
rivaroxaban (Xarelto) & apixaban (Eliquis) Therapeutic Levels
N/A
rivaroxaban (Xarelto) & apixaban (Eliquis) Adverse Effects
Bleeding; acute renal failure
rivaroxaban (Xarelto) & apixaban (Eliquis) Antidote
Charcoal within 2-3 hrs of intake or (non)activated PCC; hemodialysis
dabigatran (Pradaxa) Use
Preventing stroke & embolism due to non-valvular related AF
dabigatran (Pradaxa) Action
DIRECT: Potentiates the action of antithrombin
dabigatran (Pradaxa) Onset
1-3 hours
dabigatran (Pradaxa) Duration
12-14 hours
dabigatran (Pradaxa) Treatment
years
dabigatran (Pradaxa) Route
PO
dabigatran (Pradaxa) Normal Times
N/A
dabigatran (Pradaxa) Therapeutic Levels
N/A
dabigatran (Pradaxa) Adverse Effects
Bleeding; Acute renal failure
dabigatran (Pradaxa) Antidote
Charcoal within 2-3 hrs of intake or (non)activated PCC; hemodialysis
When can spontaneous bleeding occur?
Above PTT > 100 secs; PT > 30 secs
What does antithrombotic therapy reduce risk of?
AF, stroke, ACS, heart valve replacement issues, VTE (PE, DVT), hypercoagulable states, & stent clotting
What is the main antagonist for anticoagulants?
Vitamin K
When should you discontinue the use of anticoagulants? Who should you clarify with?
Before surgical procedures; MD,NP, or PA order
What are other antithrombotic drugs?
Aspirin, NSAIDS, Dipyridamole, Clopidrogel, & Ticlodipine