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Therapeutics Spring 2015 > ANS Flashcards Exam 2 > Flashcards

ANS Flashcards Exam 2

1
Q

ANS Exam 2 Flashcards

How is the peripheral nervous system divided up?

A

Autonomic and somatic nervous systems

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2
Q

ANS Exam 2 Flashcards

How is the autonomic nervous system divided up?

A

Sympathetic and parasympathetic nervous systems

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3
Q

ANS Exam 2 Flashcards

What two neurotransmitters are associated only with the sympathetic nervous system?

A

Epinephrine and norepinephrine

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4
Q

ANS Exam 2 Flashcards

What neurotransmitter is released by both parasympathetic and sympathetic neurons?

A

Acetylcholine

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5
Q

ANS Exam 2 Flashcards

Where do parasympathetic preganglionic neurons synapse with postganglionic neurons?

A

At ganglia near target organ

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6
Q

ANS Exam 2 Flashcards

What neurotransmitter do parasympathetic preganglionic neurons release? What kind of receptors are activated by this neurotransmitter at this location?

A

Acetylcholine; activates nicotinic receptors on postganglionic neurons

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7
Q

ANS Exam 2 Flashcards

What neurotransmitter do parasympathetic postganglionic neurons release? What kind of receptors are activated by this neurotransmitter at this location?

A

Acetylcholine; activates muscarinic receptors on the target organ

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8
Q

ANS Exam 2 Flashcards

Where do sympathetic preganglionic neurons synapse with postganglionic neurons?

A

In the paravertebral sympathetic ganglion, near the spinal cord.

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9
Q

ANS Exam 2 Flashcards

What neurotransmitter do sympathetic preganglionic neurons release? What kind of receptors are activated by this neurotransmitter at this location?

A

Acetylcholine; activates nicotinic receptors on postganglionic neurons

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10
Q

ANS Exam 2 Flashcards

What neurotransmitter do sympathetic postganglionic neurons release? What kind of receptors are activated by this neurotransmitter at this location?

A

Norepinephrine; activates adrenergic receptors on target organs

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11
Q

ANS Exam 2 Flashcards

What autonomic nervous system controls sweat glands?

A

Sympathetic nervous system

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12
Q

ANS Exam 2 Flashcards

The only postganglionic neurons in the sympathetic nervous system that release acetylcholine are in the…

A

sweat glands involved with thermoregulation.

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13
Q

ANS Exam 2 Flashcards

What autonomic nervous system controls the smooth muscle of the renal vascular bed?

A

Sympathetic nervous system

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14
Q

ANS Exam 2 Flashcards

What neurotransmitter do postganglionic sympathetic neurons release at the kidney vascular bed?

A

Dopamine – precursor to NE, causes vasodilation.

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15
Q

ANS Exam 2 Flashcards

What is unique about sympathetic innervation of the adrenal glands?

A

The preganglionic neurons do not synapse in the paravertebral ganglion. Instead, preganglionic neurons synapse directly on the adrenal gland and release acetylcholine to nicotinic receptors. Adrenal glands act like the postganglionic neuron because the release epinephrine.

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16
Q

ANS Exam 2 Flashcards

What are two other names for cholinergic drugs?

A

Muscarinic agonists and parasympathomimetics

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17
Q

ANS Exam 2 Flashcards

What are two other names for muscarinic antagonists?

A

Anticholinergics and parasympatholytics

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18
Q

ANS Exam 2 Flashcards

What are two other names for sympathomimetics?

A

Adrenergics or adrenergic agonists

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19
Q

ANS Exam 2 Flashcards

What are two other names for antiadrenergics?

A

Adrenergic antagonist and sympatholytic

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20
Q

ANS Exam 2 Flashcards

Name three parts of the body where you can find nicotinic receptors.

A

Ganglion, skeletal muscle, and neuronal CNS

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21
Q

ANS Exam 2 Flashcards

How many subunits compose the nicotinic receptor?

A

Five

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22
Q

ANS Exam 2 Flashcards

Where is the M3 muscarinic receptor found?

A

Smooth muscle in glands – causes contraction that releases gland contents

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23
Q

ANS Exam 2 Flashcards

Where is the M2 muscarinic receptor found?

A

The heart – decreases heart rate.

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24
Q

ANS Exam 2 Flashcards

What kind of receptor is a muscarinic receptor?

A

A 7 transmembrane domain GPCR or heterotrimeric G protein receptor

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25
# ANS Exam 2 Flashcards What kind of G alpha subunit do M1, M3, and M5 receptors release?
Gq subunits
26
# ANS Exam 2 Flashcards What net effect does M1, M3, and M5 receptor activation cause?
Activation of protein kinase C (PKC) and increased levels of calcium
27
# ANS Exam 2 Flashcards What effector does the Gq subunit act on once activated by M1, M3, or M5 receptors?
Phospholipase C (PLC) which splits PIP2 into DAG and IP3
28
# ANS Exam 2 Flashcards What kind of G alpha subunit do M2 and M4 receptors release?
Gio subunits
29
# ANS Exam 2 Flashcards What is the net effect of M2 and M4 receptor activation?
Decreased cAMP formation, which decreases PKA activity, and opening of potassium channels.
30
# ANS Exam 2 Flashcards In what major organ are alpha-1 adrenergic receptors located and what is their effect?
In the smooth muscle around arteries -- causes vasoconstriction which increases BP
31
# ANS Exam 2 Flashcards In what major organ are alpha-2 adrenergic receptors located and what is their effect?
In the cardiovascular control center of the brainstem -- they turn off the sympathetic nervous system (?)
32
# ANS Exam 2 Flashcards In what major organ are beta-1 adrenergic receptors located?
The heart
33
# ANS Exam 2 Flashcards In what major organ are beta-2 adrenergic receptors located?
Smooth muscle
34
# ANS Exam 2 Flashcards Alpha 1 adrenergic receptors activate Gq, activating PLC and eventually leading to increased calcium in the cell and activated PKC. What other receptor(s) is alpha 1 similar to?
M1, M3, and M5 receptors
35
# ANS Exam 2 Flashcards What G alpha subunit do alpha-2 adrenergic receptors activate?
Gi
36
# ANS Exam 2 Flashcards What is the net effect of alpha-2 activation?
Decreased levels of cAMP, leading to less kinase activity
37
# ANS Exam 2 Flashcards What G alpha subunit do beta adrenergic receptors activate?
Gs
38
# ANS Exam 2 Flashcards What is the net effect of beta adrenergic activation?
Increased levels of cAMP, leading to increased kinase activity.
39
# ANS Exam 2 Flashcards What receptors in the heart decrease rate and force of contraction?
M2 receptors -- parasympathetic
40
# ANS Exam 2 Flashcards What receptors in the heart increase rate and force of contraction?
B1 > B2
41
# ANS Exam 2 Flashcards What receptors in most arteries and veins cause vasodilation?
Trick question -- only the sympathetic system innervates arteries and veins, and sympathetic stimulation causes vasoconstriction. A decrease in sympathetic activation causes vasodilation.
42
# ANS Exam 2 Flashcards What receptors in skeletal muscle arteries cause vasodilation?
B2 receptors -- sympathetic
43
# ANS Exam 2 Flashcards What receptor causes endothelium to release EDRF?
M3 receptors -- parasympathetic
44
# ANS Exam 2 Flashcards What receptor causes bronchodilation in the lungs?
B2 receptors -- sympathetic
45
# ANS Exam 2 Flashcards What receptor causes bronchoconstriction in the lungs?
M2 and M3 receptors -- parasympathetic
46
# ANS Exam 2 Flashcards What receptor causes relaxation of the bladder wall?
B2 receptors -- sympathetic
47
# ANS Exam 2 Flashcards What receptor causes contraction of the bladder wall?
M3 receptors -- parasympathetic
48
# ANS Exam 2 Flashcards What receptor causes contraction of the ureter and sphincter?
A1 receptors -- sympathetic
49
# ANS Exam 2 Flashcards What receptor causes relaxation of the ureter and sphincter?
M3 -- parasympathetic
50
# ANS Exam 2 Flashcards What parasympathetic receptor plays a role in a pregnant uterus?
M3 receptor
51
# ANS Exam 2 Flashcards In the pregnant uterus, what sympathetic receptor causes relaxation? Contraction?
Relaxation -- B2 (target if premature contractions) Contraction -- A1
52
# ANS Exam 2 Flashcards What receptor causes erection of the penis?
M3 -- parasympathetic
53
# ANS Exam 2 Flashcards What receptor causes penile ejaculation?
A1 -- sympathetic (sperm flight)
54
# ANS Exam 2 Flashcards In what gland do sympathetic and parasympathetic receptors have the same response?
Salivary gland
55
# ANS Exam 2 Flashcards What two receptors causes increased salivary secretion?
A1 (sympathetic) and M3 (parasympathetic)
56
# ANS Exam 2 Flashcards What receptor causes increased GI secretion?
M2 and M3 -- parasympathetic
57
# ANS Exam 2 Flashcards What receptor inhibits GI secretion?
A2 -- sympathetic
58
# ANS Exam 2 Flashcards What receptors cause both GI wall contraction and GI sphincter relaxation?
M2 and M3 -- parasympathetic
59
# ANS Exam 2 Flashcards What receptor causes contraction of GI sphincters?
A1 receptors -- sympathetic
60
# ANS Exam 2 Flashcards What receptor causes relaxation of GI walls?
A2 and B2 receptors -- sympathetic
61
# ANS Exam 2 Flashcards What receptor causes contraction of hair follicles and goosebumps?
A1 -- sympathetic
62
# ANS Exam 2 Flashcards True or false: All tissues are innervated by both the sympathetic and parasympathetic nervous system
False -- one example is skin, which is innervated only by the sympathetic nervous system
63
# ANS Exam 2 Flashcards What receptor is responsible for inducing sweating for thermal regulation?
M3 -- SYMPATHETIC (only instance)
64
# ANS Exam 2 Flashcards What receptor is responsible for inducing sweating in response to stress?
A1 receptor -- sympathetic
65
# ANS Exam 2 Flashcards What receptor is responsible for causing contraction of the radial muscle in the eye?
A1 receptor -- sympathetic
66
# ANS Exam 2 Flashcards Radial muscle contraction causes pupil...
dilation (mydriasis).
67
# ANS Exam 2 Flashcards Circular muscle contraction causes pupil...
contraction (miosis).
68
# ANS Exam 2 Flashcards What receptor is responsible for causing contraction of the circular muscle in the eye?
M3 receptor -- parasympathetic
69
# ANS Exam 2 Flashcards What receptor is responsible for causing ciliary muscle contraction?
M3 receptor -- parasympathetic
70
# ANS Exam 2 Flashcards Ciliary muscle contraction causes the lens to adjust to ___ vision.
near (short distance)
71
# ANS Exam 2 Flashcards Ciliary muscle relaxation causes the lens to adjust to ____ vision.
far (long distance)
72
# ANS Exam 2 Flashcards What receptor is responsible for stimulating the secretion of aqueous humor in the eye?
B2 -- sympathetic.
73
# ANS Exam 2 Flashcards If an eye doctor wanted to dilate your eye, what two types of agents could he administer?
M3 receptor antagonist (parasympatholytic) to stop contraction of the circular muscle (what they actually do) or A1 receptor agonist (sympathomimetic) to cause contraction of the radial muscle.
74
# ANS Exam 2 Flashcards What receptor increases renin secretion in the kidney?
B1 -- sympathetic
75
# ANS Exam 2 Flashcards List locations and functions of A1 receptors.
Vasoconstriction in arteries and veins, contraction of the ureter and urinary sphincter, penile ejaculation, contraction of the uterus, increased salivary secretion, contraction of sphincters in GI tract, contraction of hair follicles and goosebumps in skin, stimulation of sweating due to stress, contraction of the radial muscle in the eye, metabolic changes in liver and fat
76
# ANS Exam 2 Flashcards List locations and functions of A2 receptors.
Vasoconstriction in veins, relaxation of GI walls, inhibition of GI secretion, decrease in insulin release from the pancreas
77
# ANS Exam 2 Flashcards List locations and functions of B1 receptors.
Increase in the rate and force of contraction in the heart. increase in renin secretion from the kidneys.
78
# ANS Exam 2 Flashcards List locations and functions of B2 receptors.
Vasodilation in smooth muscle vasculature, bronchodilation in the lungs, bladder wall relaxation, uterus relaxation, GI wall relaxation, some minor relaxation of ciliary muscle and minor effects on heart.
79
# ANS Exam 2 Flashcards List locations and functions of M2 receptors.
Decrease in heart rate and force of contraction, bronchoconstriction, increased GI secretion, GI wall contraction, and GI sphincter relaxation.
80
# ANS Exam 2 Flashcards List locations and functions of M3 receptors.
Release of EDRF from endothelium, bronchoconstriction, all parasympathetic responses in GU and GI systems, contraction of the ciliary muscle and circular muscle, and sympathetic sweat secretion in response to heat.
81
# ANS Exam 2 Flashcards What type of agent is atropine?
A long-acting tertiary amine antimuscarinic
82
# ANS Exam 2 Flashcards What type of agent is anisotropine?
A quaternary amine antimuscarinic
83
# ANS Exam 2 Flashcards What type of agent is scopolamine?
A long-acting tertiary amine antimuscarinic
84
# ANS Exam 2 Flashcards Which has higher CNS penetration--atropine or scopolamine?
Scopolamine
85
# ANS Exam 2 Flashcards What type of agent is homotropine?
A short-acting tertiary amine antimuscarinic
86
# ANS Exam 2 Flashcards What type of agent is tropicamide?
A short-acting tertiary amine antimuscarinic
87
# ANS Exam 2 Flashcards Which has a shorter duration of action--homatropine or tropicamide?
Tropicamide
88
# ANS Exam 2 Flashcards What type of agent is procyclidine?
A tertiary amine antimuscarinic used for Parkinsons
89
# ANS Exam 2 Flashcards What type of agent is benztropine?
A tertiary amine antimuscarinic used for Parkinsons
90
# ANS Exam 2 Flashcards What type of agent is glycopyrrolate?
A quaternary amine antimuscarinic
91
# ANS Exam 2 Flashcards What type of agent is propantheline bromide?
A quaternary amine antimuscarinic
92
# ANS Exam 2 Flashcards What type of agent is ipratropium bromide?
A quaternary amine antimuscarinic for COPD
93
# ANS Exam 2 Flashcards What is glycopyrrolate used specially for?
Pre-operative drying up
94
# ANS Exam 2 Flashcards What type of agent is succinylcholine?
Depolarizing neuromuscular blocker
95
# ANS Exam 2 Flashcards What is the duration of action of succinylcholine?
5-10 minutes
96
# ANS Exam 2 Flashcards What type of agent is d-tubocurarine?
Non-depolarizing neuromuscular blocker
97
# ANS Exam 2 Flashcards What type of agent is pancuronium?
Non-depolarizing neuromuscular blocker
98
# ANS Exam 2 Flashcards What type of agent is atracurium?
Non-depolarizing neuromuscular blocker
99
# ANS Exam 2 Flashcards What type of agent is mivacurium?
Non-depolarizing neuromuscular blocker
100
# ANS Exam 2 Flashcards What type of agent is rocuronium?
Non-depolarizing neuromuscular blocker
101
# ANS Exam 2 Flashcards What is the neuromuscular blocker with the shortest duration of action?
Succinylcholine
102
# ANS Exam 2 Flashcards What is the neuromuscular blocker with the longest duration of action?
Pancuronium
103
# ANS Exam 2 Flashcards What drug class is used to relax muscles for surgery, tracheal intubation, control of ventilation, and treatment of convulsions?
Neuromuscular blockers
104
# ANS Exam 2 Flashcards True or false: Neuromuscular blockers have the potential to cross the blood-brain barrier, depending on the structure
False -- all neuromuscular blockers have multiple charged quaternary amines
105
# ANS Exam 2 Flashcards What drug class can be used to treat incontinence, IBS, motion sickness, Parkinson's, and COPD, for pupil dilation and pre-op anti-secretory, and causes cycloplegia?
Antimuscarinics
106
# ANS Exam 2 Flashcards What drugs can treat motion sickness and Parkinson's, and cause drowsiness, mydriasis, and cycloplegia?
Tertiary amine antimuscarinics
107
# ANS Exam 2 Flashcards What type of agent is edrophonium? What can it be used to diagnose?
A reversible, non-covalent acetylcholinesterase inhibitor
108
# ANS Exam 2 Flashcards What type of agent is neostigmine?
A reversible, covalent acetylcholinesterase inhibitor
109
# ANS Exam 2 Flashcards What type of agent is pyridostigmine?
A reversible, covalent acetylcholinesterase inhibitor
110
# ANS Exam 2 Flashcards What type of agent is physostigmine?
A reversible, covalent acetylcholinesterase inhibitor
111
# ANS Exam 2 Flashcards What type of agent is isofluorophate?
An irreversible, covalent acetylcholinesterase inhibitor (organophosphate)
112
# ANS Exam 2 Flashcards What type of agent is echothiophate?
An irreversible, covalent acetylcholinesterase inhibitor (organophosphate)
113
# ANS Exam 2 Flashcards What type of agents are sarin and soman?
Organophosphate nerve gases
114
# ANS Exam 2 Flashcards What type of agents are malathion and diazinon?
Organophosphate insecticides, rapidly inactivated in mammals and birds by esterases
115
# ANS Exam 2 Flashcards What is organophosphate aging?
A partial hydrolysis of the organophosphate bound to the ester that makes it even harder to reverse.
116
# ANS Exam 2 Flashcards What is pralidoxime chloride (2-PAM)? How does it work?
The antidote to organophosphate poisoning (pesticide or nerve gas). It is a very strong nucleophile, so it reacts with the strong electrophile, the organophosphate. Must be given within a few hours.
117
# ANS Exam 2 Flashcards When should you never use a parasympathomimetic (AchE inhibitors or direct acting drugs)?
Asthma, COPD, peptic ulcer, obstruction of the urinary or GI tract
118
# ANS Exam 2 Flashcards What are the side effects associated with cholinergics?
SLUD -- salivation, lacrimation, urination, defecation, sweating, pupil constriction, lower heart rate, and CNS activation (hallucinations, seizures)
119
# ANS Exam 2 Flashcards Why are cholinergics (esp AchE inhibitors) used to treat alzheimers?
Alzheimers causes loss of cholinergic neurons. AchE inhibitors increase the amount of Ach in the brain.
120
# ANS Exam 2 Flashcards What type of agents are tacrine and donepezil?
Reversible, non-covalent AchE inhibitors that enhance cognitive ability in Alzheimers but does not stop disease progression
121
# ANS Exam 2 Flashcards What type of agents are rivastigmine and eptastigmine?
Reversible AchE inhibitors used in Alzheimers that increase cognitive ability but lose effectiveness as disease progresses
122
# ANS Exam 2 Flashcards What type of agent is galantamine?
A reversible competitive AChE inhibitor used in Alzheimers that loses effectiveness as disease progresses.
123
# ANS Exam 2 Flashcards What type of agent is memantine?
A NMDA receptor antagonist that decreases excitotoxicity of glutamate and slows the progression of the disease.
124
# ANS Exam 2 Flashcards What type of agent is carbachol?
A nonselective sympathomimetic that is not sensitive to AChE
125
# ANS Exam 2 Flashcards What type of agent is methacholine?
A nonselective sympathomimetic that is not sensitive to AChE
126
# ANS Exam 2 Flashcards What type of agent is bethanechol?
A selective muscarinic agonist that is not sensitive to AChE
127
# ANS Exam 2 Flashcards What type of agent is pilocarpine?
A selective muscarinic agonist that is not sensitive to AChE
128
# ANS Exam 2 Flashcards What type of agent is varenicline?
A selective nicotinic partial agonist that is not sensitive to AChE
129
# ANS Exam 2 Flashcards A methyl substitution on a direct acetylcholine agonist on an alpha carbon directs selectivity towards which receptor--muscarinic or nicotinic?
Nicotinic
130
# ANS Exam 2 Flashcards What is the structural difference between epinephrine and norepinephrine?
Epinephrine has a methyl group on the nitrogen
131
# ANS Exam 2 Flashcards What is the first molecule created by the slow step in the synthesis of epinephrine from tyrosine?
DOPA
132
# ANS Exam 2 Flashcards In what order are epinephrine, norepinephrine, and dopamine synthesized?
Dopamine, norepinephrine, and epinephrine
133
# ANS Exam 2 Flashcards What is the end product of the metabolism of norepinephrine?
Vanilylmandelic acid (VMA)
134
# ANS Exam 2 Flashcards What two major enzymes are involved in norepinephrine metabolism? Which acts first within the cell?
COMT (catechol o-methyl transferase) and MAO (monoamine oxidase). MAO first in cells (but not necessarily if norepinephrine goes through gut)
135
# ANS Exam 2 Flashcards What endogenous ligand must be present at high levels in order to activate B2 receptors but activates the others at lower levels?
Norepinephrine
136
# ANS Exam 2 Flashcards What is the most nonselective endogenous sympathetic ligand?
Epinephrine
137
# ANS Exam 2 Flashcards What receptor is most strongly triggered by dopamine?
B1
138
# ANS Exam 2 Flashcards What is the main function of an a1 agonist?
Vasoconstriction
139
# ANS Exam 2 Flashcards What type of agent is phenylephrine?
An a1 receptor agonist -- pressor. Susceptible to MAO but not COMT
140
# ANS Exam 2 Flashcards What type of agent is methoxamine?
An a1 receptor agonist -- pressor
141
# ANS Exam 2 Flashcards What type of agent is oxymetazoline?
A partial a1 receptor agonist -- pressor
142
# ANS Exam 2 Flashcards What type of agent is tetrahydrozoline?
A partial a1 receptor agonist -- pressor.
143
# ANS Exam 2 Flashcards What type of agent is naphazoline?
A partial a1 receptor agonist -- pressor
144
# ANS Exam 2 Flashcards What are the risks and uses for the 2-aralkylimidazoline a1 receptor agonists?
Nasal and ophthalmic decongestants -- ionized at physiological pH -- risk of desensitization so <3 day use.
145
# ANS Exam 2 Flashcards What type of agent is clonidine?
A selective a2 receptor agonist
146
# ANS Exam 2 Flashcards What type of agent is guanabenz?
An a2 receptor agonist
147
# ANS Exam 2 Flashcards What type of agent is guanfacine?
An a2 receptor agonist
148
# ANS Exam 2 Flashcards Which has a shorter half-life--guanabenz or guanfacine?
Guanabenz (shortest of a2 agonists)
149
# ANS Exam 2 Flashcards How do a2 agonists decrease blood pressure?
They decrease sympathetic tone, leaded to decreased heart rate, contractility, renin release, and vasoconstriction--all of which act to lower blood pressure.
150
# ANS Exam 2 Flashcards What type of agent is methyldopa?
An a2 receptor agonist prodrug
151
# ANS Exam 2 Flashcards What side effects are associated with a2 agonists?
Sedation, Na+ and water retention, dry mouth, and withdrawal syndrome if stopped suddenly
152
# ANS Exam 2 Flashcards What type of agent is isoproterenol?
A non-selective B receptor agonist, sensitive to COMT but not to MAO.
153
# ANS Exam 2 Flashcards What type of agent is metaproterenol?
A selective B2 receptor agonist, not metabolized by MAO or COMT
154
# ANS Exam 2 Flashcards What type of agent is terbutaline?
A selective B2 receptor agonist, not metabolized by MAO or COMT
155
# ANS Exam 2 Flashcards What is terbutaline used for that metaproterenol is not?
Tocolytic to prevent premature labor
156
# ANS Exam 2 Flashcards What is the primary effect of B2 agonists?
Bronchodilation
157
# ANS Exam 2 Flashcards What are the primary effects of nonselective B agonists?
Bronchodilation, increased CO
158
# ANS Exam 2 Flashcards What type of agent is albuterol (or levalbuterol)?
A selective B2 receptor agonist
159
# ANS Exam 2 Flashcards Which has a longer duration of action--isoproterenol or albuterol and salmeterol?
Albuterol and salmeterol
160
# ANS Exam 2 Flashcards What type of agent is salmeterol?
A selective B2 receptor agonist
161
# ANS Exam 2 Flashcards What type of agent is formoterol?
A selective B2 receptor agonist
162
# ANS Exam 2 Flashcards Are any of the beta agonists sensitive to MAO?
No
163
# ANS Exam 2 Flashcards What beta agonists are sensitive to COMT?
Isoproterenol and dobutamine
164
# ANS Exam 2 Flashcards What two selective B2 agonists are longer acting?
Salmeterol and formoterol (shorter onset)
165
# ANS Exam 2 Flashcards What type of agent is dobutamine?
Potent B1 agonist, a1 agonist and antagonist with short half life--net effect increase contractility in acute HF, shock
166
# ANS Exam 2 Flashcards What is the difference between ephedrine and pseudoephedrine?
They are diastereomers. Pseudoephedrine has less agonist activity but instead acts to reverse the transporter.
167
# ANS Exam 2 Flashcards What are the general types of indirect-acting sympathomimetics?
MAO inhibitors, transporter blockers, transporter reversers
168
# ANS Exam 2 Flashcards What type of agent is amphetamine?
Norepinephrine transporter reverser
169
# ANS Exam 2 Flashcards What type of agent is phenylpropanolamine?
Norepinephrine transporter reverser
170
# ANS Exam 2 Flashcards What type of agent is pseudoephedrine?
Norepinephrine transporter reverser
171
# ANS Exam 2 Flashcards What type of agent is tyramine?
Norepinephrine transporter reverser and norepinephrine synthesis inhibitor
172
# ANS Exam 2 Flashcards What type of agent is ephedrine?
Norepinephrine transporter reverser
173
# ANS Exam 2 Flashcards What are the clinical uses for a norepinephrine transporter reverser?
ADHD, narcolepsy, anorexiant, nasal decongestant
174
# ANS Exam 2 Flashcards What type of agents are cocaine and antidepressants?
Transporter blockers -- increase [NE] in synapse
175
# ANS Exam 2 Flashcards What type of agent is phenelzine?
MAO inhibitor
176
# ANS Exam 2 Flashcards What type of agent is selegiline?
MAO inhibitor
177
# ANS Exam 2 Flashcards True or false: A combination of indirect-acting sympathomimetic drugs is used for effective treatment.
False -- co-administration of indirect-acting sympathomimetics can lead to hypertensive crisis.
178
# ANS Exam 2 Flashcards What substituent makes a sympathomimetic resistant to MAO?
A large alkyl group on the amine
179
# ANS Exam 2 Flashcards A tera-butyl group on the amine for a sympathomimetic increases selectivity for which receptor?
B2
180
# ANS Exam 2 Flashcards What kind of substituent on a sympathomimetic blocks MAO oxidation, increases lipophilicity, and makes the molecule a transporter reverser instead of a direct agonist--beta or alpha?
Alpha methyl substitution -- makes it an amphetamine!
181
# ANS Exam 2 Flashcards A beta hydroxyl on a sympathomimetic does what?
Enhances uptake and storage, makes molecule a direct agonist
182
# ANS Exam 2 Flashcards What groups must be present in order to be susceptible to COMT?
Two catechol hydroxyls on carbons 3 and 4
183
# ANS Exam 2 Flashcards What does moving a hydroxyl on a catechol to create a resorcinol do to receptor selectivity?
Makes it B2 selective.
184
# ANS Exam 2 Flashcards What type of agent is phenoxybenzamine?
The nonselective a1 and a2 receptor antagonist that also blocks acetylcholine, histamine, and serotonin. Only irreversible sympathetic antagonist.
185
# ANS Exam 2 Flashcards What type of agent is phentolamine?
A competitive, nonselective alpha antagonist. Significant reflex tachycardia and also blocks 5-HT receptors and is a muscarinic/histamine receptor agonist.
186
# ANS Exam 2 Flashcards What type of agent is prazosin?
An a1 antagonist (vasodilator)
187
# ANS Exam 2 Flashcards What type of agent is terazosin?
An a1 antagonist (vasodilator)
188
# ANS Exam 2 Flashcards What type of agent is doxazosin?
An a1 antagonist (vasodilator)
189
# ANS Exam 2 Flashcards Put the -zosin drugs in order from shortest half life to longest half life
Prazosin (3h) < terazosin (12h) < doxazosin (20h)
190
# ANS Exam 2 Flashcards What ailment, besides hypertension, do the -zosin drugs treat?
BPH -- relax smooth muscle in prostate and bladder base
191
# ANS Exam 2 Flashcards What major side effect should patients be warned about regarding the -zosin drugs?
Orthostatic hypotension, especially with first few doses
192
# ANS Exam 2 Flashcards What do we do to avoid reflex tachycardia?
Give an a1 antagonist slowly or orally so you do not trip the baroreceptors
193
# ANS Exam 2 Flashcards What type of agent is yohimbine?
An a2 antagonist that increases sympathetic discharge (male impotence?)
194
# ANS Exam 2 Flashcards What are the hallmark structural parts of a beta blocker?
A non-carbon atom in side chain attached to an aromatic ring structure, with a bulky alkyl group on the amine on the other end
195
# ANS Exam 2 Flashcards What type of agent is propranolol?
A non-selecive, lipophilic beta blocker
196
# ANS Exam 2 Flashcards What is the primary way a beta blocker impacts blood pressure?
Decreasing the renin release from the kidney
197
# ANS Exam 2 Flashcards Are the increase in VLDL and decrease in HDL a point of concern with beta blockers?
No -- usually resolves after a month
198
# ANS Exam 2 Flashcards Why should beta blockers be used cautiously in diabetics?
They inhibit the body's response to hypoglycemia
199
# ANS Exam 2 Flashcards Hypertension, angina, cardiac arrhythmias, migraine, stage fright, thyrotoxicosis, glaucoma, and congestive heart failure stage II and III can all be treated by...
Beta blockers.
200
# ANS Exam 2 Flashcards What type of agent is nadolol?
A nonselective but less lipophilic and longer lasting beta blocker
201
# ANS Exam 2 Flashcards What type of agent is timolol?
A nonselective beta blocker
202
# ANS Exam 2 Flashcards What type of agent is pindolol?
A nonselective PARTIAL beta receptor agonist (functions like antagonist)
203
# ANS Exam 2 Flashcards What type of agent is carteolol?
A nonselective PARTIAL beta receptor agonist (functions like antagonist)
204
# ANS Exam 2 Flashcards What type of agent is metoprolol?
A selective B1 receptor antagonist
205
# ANS Exam 2 Flashcards What type of agent is bisoprolol?
A selective B1 receptor antagonist
206
# ANS Exam 2 Flashcards What type of agent is atenolol?
A selective B1 receptor antagonist with low lipophilicity and longer half-life
207
# ANS Exam 2 Flashcards What type of agent is esmolol?
A selective B1 receptor antagonist that is VERY short acting (9 minutes)
208
# ANS Exam 2 Flashcards What type of agent is nebivolol?
A new selective B1 receptor antagonist that also works to produce nitric oxide, both mechanisms producing vasodilation
209
# ANS Exam 2 Flashcards What type of agent is labetalol?
A non-selective B and a1 antagonist -- combination prevents reflex tachycardia
210
# ANS Exam 2 Flashcards What drug is used for hypertensive crisis?
Labetalol
211
# ANS Exam 2 Flashcards What type of agent is carvedilol?
A non-selective B and a1 antagonist -- combination prevents reflex tachycardia. CHF II and III too.
212
# ANS Exam 2 Flashcards What side effects are associated with beta blockers?
Bradycardia, AV block, sedation (esp if lipophilic), withdrawal syndrome, masking symptoms of hypoglycemia
213
# ANS Exam 2 Flashcards When are beta blockers contraindicated?
Asthma, COPD, CHF type IV
214
# ANS Exam 2 Flashcards What type of agent is reserpine?
A catecholamine deplete that blocks the loading of NE into vesicles. Slow onset, may precipitate depression.
215
# ANS Exam 2 Flashcards What type of agent is beryllium tosylate?
An indirect sympatholytic that blocks the fusion of the vesicle or release of NE.

Therapeutics Spring 2015 (12 decks)

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