Drugs Flashcards
Reversal for dabigatran?
idaricizumab
MOA of dabigatran?
direct thrombin inhibitor
Can we get rid of dabigatran via dialysis?
YES
MOA of rivaraxaban?
Factor Xa inhibitor
Reversal for rivaraxaban?
andexanet alfa
For immediate reversa of rivaraxoba, where we dont have andexanet alfa, what do we use for reversal?
4-factor PCC
MOA of fondaparinux?
binds to anti-thrombin III, resulting in inhibition of factor Xa
MOA of clopidrogel?
irreversably blocks ADP receptor P2Y12 on platelet membrane
Reversal agents for warfarin?
PO vit K
FFP
PCC
What abx can precipitate serotonin syndrome?
linezolid
Sxs of serotonin syndrome?
high body temp
agitation
sweating, diarrhea, dilated pupils
Mu-opioid antagonist can mitigate the GI effects of narcotics without interfering with their analgesic affects and has been shown to be beneficial in ERAS protocols:
alvimopam
Idaricizumab is reversal for what?
dabigatran
Onset of idaricizumab for dabigatran reversal?
immediate onset
good for 24 hrs
**idaricizumab is a direct antibody that neutralizes dabigatran directly
If idaricizumab is not available, how do we reverse dabigatran?
4 factor PCC
Optimal reversal agent of all factor Xa inhibitors and warfarin?
4-factor PCC
Onset of 4-factor PCC in reversing factor Xa inhibitors and warfarin?
5-15 mins
lasts for 12-24 hrs
Half life of dabigatran?
12-17 hrs
Half life of rivaraxaban or apixaban?
riv—-> 5-9 hrs
apixaban–> 12 hrs
Pt has epidural catheter in place, post-op develops LE weakness and numbness; what are you thinking?
epidural hematoma
get an MRI
Pts with coronary stents on dual anti platelet therapy; ASA and plavix, when should their elective surgeries be performed?
defer for at least 6 weeks after bare-metal stent
defer for at least 6 months after drug-eluting stent
MOA of methadone?
full opioid agonist
dosed daily
4 factor PCC is used or warfarin reversal, what does it contain?
factors II, VII, IX, X
proteins C, S, antithrombin III
This direct thrombin inhibitor is given orally;
dabigatran
What thrombin inhibitors given IV?
argatroban
bivalurdin
Dabigatran is an oral direct thrombin inhibitor that should be used with caution in pts with?
renal problems
metabolized by the kidneys
Dabigatran is metabolized by?
kidneys
This Xa inhibitor is metabolized by kidneys and should not be given to pts with low Cr clearance;
rivaraxoban
What Xa inhibitor can be given to pts with renal problems?
apixaban
hepatically cleared
Apixaban is cleared by?
liver
OK in renal insufficiency
vWF is a carrier protein for which factor?
VIII
HIT has two types, what is type I?
hep associated thrombocytopenia
heparin clumps platelets directly
usually within first 48-72 hrs
mild/transient thrombocytopenia, with return to normal
no lab tests needed, can continue heparin
IgG antibody against platelet factor 4?
HIT type 2
can cause thromboses
seen 4-5 days after starting UH/LMWH
Half life of rivaraxoban?
5- 9 hrs in healthy pts
11-13 in elderly pts
TXA shown the greatest benefits when used within what time frame?
within 3 hrs
Only vasopressor that acts on all 5 adrenergic receptors;
epinephrine
Pure a-adrenergic vasoconstrictor;
phenylephrine
Can produce reflex bradycardia when sympathetic tone is lacking;
phenylephrine
Toxic metabolite of meperidine?
normeperidine
MOA of meperidine?
u-opioid agonist
What do we have to be careful with with meperidine?
toxic metabolite normeperidine accumulates in renal failure pts
can cause CNS irritability, seizures
MOA of dantrolene?
ryanodine receptor antagonist
What causes malignant hyperthermia?
mutation in raynodine receptor type 1
SE of reglan/metoclopramide?
acute dystonic reaction (involuntary muscle contractions)
Flumazenil>
antidote for benzo overdose
GABA-A antagonist
How do you correct Ca levels for hypoalbuminemia?
0.8 x [4 - measured albumin]
Free Water Deficit Formula;
total body water x weight (kg) x (current Na/desired Na -1)
MOst common side effect of pancuronium?
tachycardia
How long does pancuronium last>
up to 90 mins
SE of atracurium?
histamine release
PTLD caused by what virus?
EB virus
transplant pts develop lymphomas
tx-> reduce immunosuppression first, rituximab if needed, surgery doesnt have a role
What makes up CHOP therapy?
cyclophosphamide
doxarubicin
vincristine
prednisolone
MOA of IV magnesium when used as a tocolytic in pre-term labor?
blocks influx of Ca at motor end plate
tocolysis delays delivery up to 48 hrs so steroids can be given for lung maturity
MC side effect of mciphenolate mofetil?
leukopenia