Pharm Oral Final Flashcards
MAC of DES
6%
MAC of SEVO
2%
MAC of ISO
1.2%
MAC of N2O
104%
VP Des
669 mmHg
VP Sevo
157 mmHg
VP Iso
238 mmHg
VP N2O
38770 mmHg
BG Des
.42
BG Sevo
.65
BG Iso
1.46
BG N2O
.42
Induction dose of Propofol
1.5-2.5 mg/kg
Induction dose of Ketamine
1-2.5 mg/kg IV
4-8 mg/kg IM “dart”
Induction dose of Etomidate
.2-.4 mg/kg
MOA propofol
GABA agonist
MOA ketamine
NMDA antagonist
MOA etomidate
GABA agonist
Vd Propofol
3.5-4.5 L/kg
Vd Ketamine
2.5-3.5 L/kg
Vd Etomidate
2.2-4.5 L/kg
Half-life Propofol
30min-1.5 hrs
CST <40 min
Half-life Ketamine
2-3 hours
Half-life Etomidate
2-5 hours
MOA Midazolam
GABA agonist
Midazolam dosing
- 02-0.04 mg/kg IV
0. 4-0.8 PO peds
Midazolam Vd
1-1.7 L/kg
Midazolam half-life
1.9 hours
Diazepam MOA
GABA agonist
Diazepam dosing
0.1 mg/kg IV
Diazepam Vd
0.8-1.3 L/kg
Diazepam half-life
> 40 hours
MOA lorazepam
GABA agonist
most potent benzo, slowest onset of action
lorazepam dosing
50 mcg/kg IV
max 4 mg
lorazepam Vd
0.8-1.3 L/kg
lorazepam half-life
14 hours
flumazenil
selective benzodiazepine antagonist
weak intrinsic agonist of gaba, no abrupt reversal
0.2mg IV followed by 0.1 mg every 1 min
0.5-1 mg completely abolishes benzo effect
Thiopental MOA
GABA agonist
Methohexital MOA
GABA agonist
Thiopental Induction Dose
2.5-.5.0 mg/kg IV
Thiopental Vd
large
Thiopental Half-life
ten-fold propofol
Methohexital Induction Dose
1-2 mg/kg
Methohexital Vd
large
Methohexital Half-life
long ten-fold propofol
Morphine MOA
opioid receptor agonist
phenanthrene
half-life: 1.7-3.3 hrs
Morphine dosing
2.5-5 mg
Morphine Vd
2.8 L/kg
Meperidine MOA
Mu receptor agonist Kappa receptor agonist for shivering 1/10 as potent as morphine phenylpiperdine ring half life 3-5 hours
Fentanyl dosing
1-3 mcg/kg to blunt SNS surgical response
Fentanyl MOA
opioid agonist, synthetic opioid
75-125 times more potent than morphine
Fentanyl CST
half-life 2-4 hours
increases with infusions on longer than 2 hours
Sufentanil dosing
0.1-0.4 mcg/kg
Sufentanil MOA
opioid agonist/synthetic opioid
most potent of phenylpiperdines
5-10 more times potent than fent
Sufentanil CST
30 mins
Remifentanil MOA
synthetic opioid
selective Mu agonist
same potency as fentanyl
ester linkage
Remifentanil dosing
1 mcg/kg induction
- 1-0.3 mcg/kg/min
- 25-1 mcg/kg analgesia
Alfentanil MOA
opioid agonist (synthetic opioid) less potent than fentanyl; shorter duration of action
Alfentanil Vd
0.6L/kg
high fraction of unionized drug (gives rise to rapid onset)
Alfentanil dosing
15 mcg/kg blunts stimulation of DL
150-300 mcg/kg IV – produces unconsciousness (induction)
combo with inhaled anesthetic 15-150 mcg/kg/hr
Alfentanil CST
60 mins
Butorphanol MOA
opioid agonist/antagonist
low affinity for mu receptor (antagonist)
moderate affinity for kappa receptor (partial agonist)
Nalbuphine MOA
opioid agonist/antagonist
antagonism at mu receptor
agonism at kappa receptor
Opioid receptor agonist
Receptors located in spine, brain and periphery
• Pre synaptic – inhibit release of acetylcholine,
dopamine, norepinephrine and Substance P
• Post synaptic – increased K+ conductance = decreased function
Opioid receptors are G protein-coupled receptors
• Principle effect is to decrease neurotransmission
• Mimic the actions of endogenous ligands
• Enkephalins, endorphins and dynorphins
Mu1
- Analgesia (supraspinal and spinal)
- Euphoria
- Miosis
- Bradycardia
- Urinary retention
Mu2
Analgesia (spinal) Depression of ventilation Physical dependence Constipation "CAVA"
Kappa
Activation results in the inhibition of neurotransmitter release
• Analgesia (supraspinal and spinal)
• Dysphoria, sedation
• Miosis
• Diuresis
• Lesser extent - hypoventilation and high-intensity pain
• Agonist-antagonist often act principally on K receptors’
• Low abuse potential
Acetaminophen MOA
Activation of serotonergic pathways
Antagonism of NMDA, substance P and nitric oxide pathways
nonselective cox inhibitor
Ibuprofen MOA
non selective cox inhibitor
Ketorolac MOA
non selective cox inhibitor
Celecoxib MOA
selective cox 2 inhibitor
increased CV risk
Acetaminophen DOSING
325-650 mg PO 4-6h
Do not exceed >4,000mg/24h
IV: 1,000mg Q6h
Dexmedetomidine dosing
0.5-2 mcg/kg (max dose 20 mcg) gtt 0.2-0.7 mcg/kg/hr severe bradycardia half life: 2hrs Vd: 1.54 l/kg
Dexmedetomidine moa
highly selective alpha 2 agonist (presynaptic receptor)
blunts central sympathetic response
Ketorolac dosing
15 mg IV Q6hrs preop
Celecoxib dosing
400 mg PO preop
200 mg BID x5 days post op
Ibuprofen dosing
200-800 mg PO
Ibuprofen dosing
200-800 mg PO
NMDA antagonist
NMDA: N-methyl-D-aspartate, GPCR ionotropic glutamate receptor
NMDA antagonists bind to receptor and inhibit function of glutamate (endogenous excitatory neurotransmitter)
GABA agonist
Gamma-aminobutyric acid, major inhibitory neurotransmitter in CNS
Endogenous GABA binds to receptor and exerts its effects on chloride ion channels to cause hyperpolarization of the cell
Propofol & Etomidate bind to alpha subunit on GABA receptor and allosterically promote the effect of endogenous GABA
meperidine dosing
12.5 mg postop shivering
meperidine Vd
2.6 L/kg
remifentanil Vd
0.39 L/kg
remifentanil cst
4 mins
sufentanil Vd
2 L/kg
fentanyl Vd
4 L/kg