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4758412
Adrenergic Agonists
Description
? Pharmacology Mind Map on Adrenergic Agonists, created by Lindie Metz on 06/03/2016.
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pharmacology
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Mind Map by
Lindie Metz
, updated more than 1 year ago
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Created by
Lindie Metz
over 8 years ago
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Resource summary
Adrenergic Agonists
Catecolamines
Rapid inactivation (COMT/MAO), cannot be taken orally. Poor CNS penetration.
Epinephrine, Norpeinephrine, Dopamine
Affects sympathetic NS through adrenoreceptors
Non-catecolamines
Long half-life (slow MAO), can be taken orally. Penetration into CNS.
Ephedrine
Direct acting
Epinephrine
Alpha1, 2 Beta 1, 2
Alpha 1 (vasoconstriction) – delays absorption of anaesthetics, control superficial bleeding, increase BP Beta 1 – overcome AV heart. Beta 2 – bronchodilation
Hypersensitive crisis (↑ BP), Dysrhythmias, Angina Pectoris, Hyperglycaemia
Dopamine
Alpha and Beta
Cardiogenic and septic shock, raises BP and increases cardiac output. Enhances kidney and splancnic perfusion
Indirect acting
Amphetamines
Enhance E and EN
Stimulatory (E/NE), increase BP through release of Dopamine and NE
Mixed
Ephidrine
Release stored NE and stimulate α and β receptors. Vasoconstriction, bronchodilation.
1. Direct receptor binding
2. Promote NE release
3. Inhibit NE reuptake
4. Inhibition of NE inactivation (MAO)
Receptors
α1
Eyes, blood vessels, male sex organs, prostatic capsule, bladder
α2
β1
Heart, kidney
β2
Blood vessels, bronchi, GIT, liver, skeletal muscle
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