Dyslipidemia Flashcards
cholesterol is synthesized by ___
liver
additional cholesterol comes from __
diet
cholesterol has a ___ structure
membrane
cholesterol is a precursor to ___
steroid hormones
lipid categories
endogenous and dietary cholesterol
triglycerides
total - c =
LDL-c + HDL-c + VLDL - c
LDL
low density lipoproteins – bad
HDL
high density lipoproteins – good
triglyceride categories:
vldl-c
optimal LDL
<100
high LDL
160-189
causes of secondary dyslipidemia
diabetes hypothyroid obstructive liver disease chronic renal failure drugs
TLC diet to lower LDL
reduced intake of cholesterol raising nutrients
LDL lowering therapeutic options
major features of TLC that lower LDL
TLC diet
weight reduction
increased physical activity
most commonly prescribed drugs from high cholesterol
HmG CoA reductase inhibitors (statins)
major side effects of statins
myopathy (increased CK)
increased liver enzymes (increased AST/ALT)
absolute contraindications to statins
liver disease
relative contraindication to statins
use with certain drugs
statins demonstrated ___
therapeutic benefits: reduce coronary events reduce CHD reduce coronary procedures reduce stroke reduce mortality
MOA of statins
block rate - limiting step in cholesterol synthesis
statin induced myopathy
serum CK >10x ULN with unexplained muscle weakness
statin induced rhabdomyalsis
serum CK >40x ULN w/ unexplained muscle pain or wekness
patients tend to present with statin induced myopathy within the first ___
12 mo
highest risk of statin induced myopathy
high dose simvastatin (zocor)
statin induced myopathy is due to ___
metabolism by cyp3a4
if patient’s experience SEs w/ statin, try ___
a different statin
HMG CoA Reductase Inhibitors
atorvastatin
rosuvastatin
cost of pitavastatin
295 – not available generically anymore
rosuvastatin (Crestor) lowers LDL by
63%
atorvastatin decreases LDL by ___
57%
simvastatin decreases LDL by ___
46%
high dose simvastatin
80mg
low dose simvastatin
40mg
high dose simvastatin users are at risk for
myopathy and rhabdo
low dose simvastatin users are at risk for
myopathy but not rhabdo
restricting dosing fo simvastatin:
80mg dose
use of 80mg dose of simvastatin should be restricted to patients who:
have bene taking it for >12mo without s/s of toxic effect son muscles
patients on 80mg dose without AE but need to take a c/I drug should ___
switch to a noter statin
patents who’s LDL-C cannot be reached on 40mg dose should be switched to statin with ___
less risk of myopathy
gemfibrozil is c/I w/ ___
simvastatin
when taking amiodarone, verapamil or diltiazem, do not ___
exceed 10mg simvastatin daily
if taking amlodipine, ranolazine, do not ___
exceed 20mg simvastatin daily
if drinking grapefruit juice, do not
ingest > 1 quart daily if taking simvastatin
____ on statins is not a reason to sotp
elevated transaminases
statin side effects are often ___
agent specific, not always class specific
if unexplained myalgia on statin w/o CK elevation, ___
try a different statin
await follow up of ___
simvastatin relabeling
very few patients receive ___
new scripts for simvastatin
MOA of bile acid sequestrates (BAS)
bind dietary cholesterol
major actions of BAS
reduces LDL by 20-25%
raises HDL by 3-5%
may increase TG
side effects w/ BAS
GI distress/constipation, diarrhea, bloating
decreased absorption of other drugs
contraindications to BAS
severe hepatic impairment raised TG (especially >400mg/dl)
BAS
cholestyramine
cholestipol
coleseyelam
generic cost of 30 day supply of coleseyelam
$561
BAS is typically add on therapy to ___
max dose statin
major actions of niacin
lowers LDL 5-25%
raises HDL 15-35%
lowers TG 10-50%
s/e of niacin
flushing
flushing with niacin is minimized by:
pretreatment with aspirin or NSAIDS 30-60 minutes prior to ingestion
niacin is currently used as ___
add on therapy (not monotherapy) if used at all
niacin did not reduce incidence of ___
primary composite endpoint
unexpected increase in ___ in niacin patients
stroke
use niacin for ____
statin intolerant patients
niacin did not reduce risk of ___ but did increase risk of ___
major CV cents / serious adverse effects
niacin is ___
little used
fibric acids decrease TG and VLDL C by
25-50%
fibric acids may lower LDL by ___ w/ normal TG
5-20%
fibric acids may raise LDL with ___
high TG
fibric acids may raise HDLC by
10-20%
fibric acids
gemfibrozil
fenofibrate
cholesterol absorption inhibitor
ezetimibe (zetia)
new class of cholesterol absorption inhibitor inhibits ___
intestinal absorption of cholesterol
ezetimibe lowers LDL by ___
20-25%
ezetimibe combined with a statin:
increases effect of statin by 10-15% w/o s/e
Vytorin =
ezetimibe + simvastatin
MOA of monoclonal antibodies
bind to pro protein converts subtilizing/kexin (PCSK9) receptors
addition to statins, monoclonal antibodies reduce LDL by
50-60%
monoclonal antibodies are given by ____
SC injetion q 2-4 wks
when should you give monoclonal AB?
add on to max dose statin
bempedoic acid is not ___
FDA approved yet
MOA of bemepdoic acid
inhibits ATP citrate lyase (key enzymes cholesterol synth)
dosing of bempedoic acid
180 mg PO DAILY
BPDA results:
LDL decrease Non-HDL decrease TC decrease apolipoprotein B decrease high sensitivity CRP decrease