Autonomic Pharmacology Flashcards
Actions of adrenergic receptors
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Examples of alpha 1 adrenergic agonists, overall effect?
Phenylephrine, midodrine, oxymetazoline
vasoconstriction
Uses for each alpha 1 adrenergic agonist
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Examples of alpha 2 adrenergic agonsists
Clonidine, Dexmedetomidine – “Precedex”
Uses of alpha 2 adrenergic agonsists
Methyldopa - lowers blood pressure, pregnancy safe
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Beta non specific adrenergci agonist example and use
Isoproterenol
- inotropic, chronotropic
- treatment for arrythmias
Beta 1 specific adrenergci agonist example and use
Dobutamine
- inotropic, mild chronotropic
- cardiogenic shock
- pharmacologic stress testing
Beta 2 specific adrenergic agonist examples abnd uses
Albuterol, Levalbuterol, Salmeterol
- bronchodilators
- Hint: -terols
Terbutaline
- tocolytic
- delays uterine contractions
Epinephrine sensitivty for alpha vs. beta receptors
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Adrenergic agonists where α = β examples and uses
Epinephrine
- Cardiac Arrest
- Anaphylaxis
- Hemostasis
Ephedrine, Pseudoephedrine
- first orally available sympathomimetic
- bronchodilation, nasal decongestant
- base ingredient for manufactured drugs of abuse
Adrenergic agonists where α = β1 >> β2 and use
Norepinephrine – “Levophed”
- Hypotension
- Shock (all forms)
Mixed adrenergic agonist where β > α and use
Dopamine
- preference for beta-1 and alpha-1
- shock (cardiogenic and neurogenic)
Mixed adrenergic agonist where α > β and use
Phentermine - “fen-phen”
- Appetite suppressant
- Remember sympathetic relationship with lipolysis and glycogenolysis
Examples of indirect adrenergic agonists
Amphetamine blocks VMAT, indirectly stops reuptake through DAT, longer time for neurotransmitter in synapse
Cocaine blocks DAT directly
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Metabolism of epinephrine and norepinephrine
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Drugs that cause MAO inhibition
Selegiline, Tyramine Overload
Side effects of adrenergic agonists
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Nonspecific adrenergic antagonists with α1> α2 example and use
Phenoxybenzamine
- advantages peri-operatively
- CNS availability
Nonspecific adrenergic antagonist with α1= α2 example
Phentolamine
reversible
alpha 1 antagonist examples and uses
Prazosin, Terazosin, Doxazosin
- can be used in hypertension
- may be more appropriate for Pheo
- BPH
- Hint: -zosin
Tamsulosin
- BPH
- urinary retention
Pheochromocytoma symptoms
P – palpitations
H – headache, hypertension
E – episodic sweating
Therapeutic uses for beta adrenergic antagonists
- Treatment of arrhythmia, angina
- Increased survival after myocardial infarction
- Decrease stress on blood vessels in ruptured aneurysm
- Treatment for social anxiety
- Treatment for thyroid storm
- Treatment of chronic hypertension
Beta-nonspecific antagonists examples and uses
Atenolol, Metoprolol
-Prolong survival after ACS
Esmolol
- fast on/off
Propranolol
- Hyperthyroidism
- Anxiety/Tremors
Timolol
-glaucoma
Hint: -olol
α/β mixed antagonists examples and uses
Labetalol
- high blood pressure
Carvedilol
- high blood pressure
- congestive heart failure
β ADRENERGIC ANTAGONISTS side effects
- Bradycardia
- Decreased myocardial activity
- Bronchoconstriction
- Hypoglycemia
Abrupt withdrawal effects
Interactions with cocaine
Actions of cholinergic receptors (M1-M3)
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Direct cholinergic agonists and uses
Metacholine - challenge test, bronchoconstriction
Pilocarpine, Carbachol - opening of canal of schlemm (eye drainage)
What is the function of cholinesterase
Breaks down acetylcholine in the synapse (stops parasympathetic response)
Cholinesetrase inhibitors examples and uses
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Side effects of cholinergic agonists
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Examples of muscarinic antagonists and uses
Atropine
- treatment for bradycardia
- eye dilation
Scopolamine
- motion sickness
Oxybutynin
- overactive bladder
Ipratropium, Tiotropium
- bronchodilation
- anti-secretion
Benztropine
- motion sickness
- antipsychotic dystonia
Side effects of muscarinic antagonists
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Action of nicotinic receptors
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Neuromuscular Junction Antagonists depolarizing agents
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Neuromuscular Junction Antagonists Non-Depolarizing Agents
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Second messengers for cholinergic receptors
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Adrenergic receptor second messengers
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