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Adrenergics - Coggle Diagram
Adrenergics
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Antagonists
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Mixed A/B antagonists
Labetelol A/B

Mixed alpha / beta blocker
Treats hypertension in pregnancy
IV hypertensive emergancy
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Receptors
Alpha
α1
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Activation

Arterial constriction - ↑ TPR
Venous constriction -
↑MAP
Mydriasis
Urinary retention
α2
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Activation

Gi decrease in cAMP
Presynaptic autoinhibitory
Decreases insulin secretion
Decreases lipolysis
Decreases aqueous humour production
Beta
β1
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Activation

↑ cAMP and CA2+
↑ HR and contractility
↑ CO
Renin release
β2
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Activation

Bronchodilation
Vasodilation
Lipolysis
Gluconeogensis
Insulin secretion + hypokalaemia
Aqueous humour production
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Agonists
Direct Agonists
Phenylephrine A1

Flannel
Nasal decongestion
Mydriasis
Pressor effects ↑MAP
Reflex bradycardia due to ↑MAP
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Dobutamine B1

↑ HR, Contractility, CO
Vasodilation (b2 action)
Treat heart failure + cardiogenic shock
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Norepinephrine

Alpha agonist, some beta activation
↑MAP
Reflex bradycardia
Increased cardiac contractility (b1 activation)

Treats septic shock
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