Autonomic Drugs -First Aid Reference Flashcards
name the adrenergic receptor
located in:
* vascular smooth muscle
* visceral smooth muscle
a1
name the adrenergic receptor
effects:
* vasconstriction
* smooth muscle contraction
a1
name the adrenergic receptor
location:
* presynaptic terminals
* salivary glands
a2
name the adrenergic receptor
effect:
inhibition of neurotransmitter release
a2
name the adrenergic receptor
location:
* heart
* kidney
b1
name the adrenergic receptor
- increase heart rate
- increase renin secretion
effects
b1
name the adrenergic receptor
location:
* bronchioles
* cardiac muscle
* liver
* visceral smooth muscle
b2
name the adrenergic receptor
effect:
* bronchodilation
* increase HR and contractility
* inhibition of insulin secretion
* vasodilation
b2
name the adrenergic receptor
location:
adipose
b3
name the adrenergic receptor
effect:
lipolysis
b3
name the adrenergic receptor
effect:
decrease heart rate and contractility
m2
name the adrenergic receptor
effect:
increase exocrine gland secretions
increase peristalsis
increase bladder contraction
bronchoconstriction
pupillary constriction
m3
indirect cholinergic agonists: carbamates
2
- psysostigmine
- neostigmine
increases ACh
used for:
* reversal of neuromuscular junction blockade
* post operative urinary retention
neostigmine
- increases ACh
- cross blood-brain barrier
- antidote for anticholinergic toxicity
physostigmine
- simple alcohol ester
- very short half-life
- increases ACh
- historically used to dx MG
edrophonium
- muscarinic antagonist
- used in eye
- produces mydriasis and cycloplegia
atropine
- muscarinic antagonist
- quaternary amine
- used for COPD, asthma
ipratropium
- muscarinic antagonist
- affects CNS
- used for motion sickness
- tertiary amine
scopalamine
direct sympathomimetics
increase HR
used for asthma/COPD
2
albuterol
salmeterol
selectivity: albuterol and salmeterol
b2>b1
- direct sympathomimetic
- decreases BP
- increase HR
- increase CO
- inotrope
dobutamine
selectivity: dobutamine
b1>b2, a
- direct sympathomimetic
- increases BP at high doses
- increase heart rate
- increase CO
- anaphylaxis, shock asthma, glaucoma
epinephrine
selectivity: epinephrine
b>a
epinephrine:
[…] effects predominate at high doses
alpha
stronger effect at b2 than noepinephrine
epinephrine
- direct sympathomimetic
- decrease BP (vasodilation)
- increase HR
- increase CO
- nonselective
isoproterenol
selectivity: isoproterenol
b1=b2
- direct sympathomimetic
- increase BP
- hypotension
- septic shock
norepinephrine
selectivity: norepinephrine
a1>a2>b1
- direct sympathomimetic
- increase BP (vasocontriction)
- decrease HR
- decrease CO
- hypotension
- decongestant
- mydriasis
phenylephrine
selectivity: phenylephrine
a1>a2
- indirect sympathomimetic
- reuptake inhibitor
- releases stored catecholamines
amphetamine
- indirect sympathomimetic
- reuptake inhibitor
- vasocontriction
- local anesthesia
- mydriasis
cocaine
- indirect sympathomimetic
- releases stored catecholamines
- nasal decongestant
- hypotension
ephedrine
- caution when giving with b-blockers
- unopposed a1 activation will cause massive increase in BP
cocaine
norepinephrine + isoproterenol
NE is a1 agonist (increased MAP + bradycardia)
isoproterenol is b2 agonist (vasodilation)
Net:
* mean decrease in MAP
* increased HR
- a2 agonist
- hypertension in pregnancy
methyldopa
- nonselective alpha blocker
- irreversible
- used preop to prevent chatecholamine crisis
- can cause orthostatic hypotension, relex tachy
phenoxybenzamine
- nonselective alpha blocker
- reversible
- can cause orthostatic hypotension, relex tachy
phentolamine
a1 selective alpha blockers
prazosin
terazosin
doxazosin
adverse effects of a1 selective alpha blockers
orthostatic hypotension
dizziness
headache
b1 selective antagonists
atenolol
metoprolol
nonselective antagonist beta blockers
B1=B2
nadolol
timolol
propranolol
nonselective a and b antagonist
labetalol