ANS Flashcards
What 2 neurotransmitters have adrenergic receptors?
epinephrine
norepinephrine
Parasympathetic receptors
cholinergic
Sympathetic receptors
adrenergic
Catecholamines involved with sympathetic system?
norepinephrine
epinephrine
dopamine
Alpha sympathetic receptors action
vasoconstriction, CNS stimulation
Beta sympathetic receptors action
bronchial, GI, uterine relaxation, cardiac stimulation
Vasoactive Adrenergic Agonist Drugs (5)
doubutamine
dopamine
epinephrine
norepinephrine
phenylephrine
Mechanism of action of vasoactive adrenergic agonist drugs
stimulate beta1 receptors
1. increase contraction
2. increase heart rate
3. increase conduction
What is one contraindication of vasoactive adrenergic agonist drugs?
pheochromocytoma
What are 3 side effects of vasoactive adrenergic agonist drugs?
- loss of appetite
- dry mouth
- n/v
What are 2 interactions of vasoactive adrenergic agonist drugs?
MAOIs
Antihistamines
What are 2 nursing implications of vasoactive adrenergic agonist drugs?
- cause increase in ADH, corticosteroids, glucose
- titrated to response
Alpha blockers drugs ending
-zosin
What are 2 indications of alpha blockers?
hypertension
BPH
What drug is specific to BPH?
flomax
Mechanism of action of alpha blockers
block stimulation of alpha 1 receptors
1. vasodilation
2. reduce smooth muscle tone in bladder and prostate
What neurotransmitter do alpha blockers specifically block?
noepinephrine
What is 1 contraindication of alpha blockers?
peripheral vascular disease
What are 4 interactions of alpha blockers?
- beta blockers
- erectile dysfunction drugs
- warfarin
- epinephrine
Beta blockers drug ending
-olol
Mechanism of action of beta blockers
- reduces myocardial stimulation
- bronchial muscle contraction
What is 1 contraindication of beta blockers?
raynaud’s disease
What are 4 interactions of beta blockers?
- antacids
- diuretics
- oral hypoglycemic drugs
- digoxin
What is 1 nursing implication for beta blockers?
dc slowly