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Adrenergic Agonists: Therapeutic Uses01:30

Adrenergic Agonists: Therapeutic Uses

Adrenergic agonists have diverse therapeutic uses across various medical conditions and emergencies.
Emergency and Intensive Care Unit (ICU) applications: Pressor agents increase blood pressure, heart rate, and contractility in shock and organ failure situations. Dopamine can induce vasodilation and stimulate adrenoceptors. Endogenous catecholamines are effective in treating cardiogenic shock. α2-agonists like clonidine can reverse anesthesia-induced hypertension.
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Adrenergic antagonists, or sympatholytics, inhibit adrenoceptor activation driven by catecholamines or agonists. Based on their adrenoceptor specificity, adrenergic blockers can be categorized into two primary groups: α-adrenergic blockers (α-blockers) and β-adrenergic blockers (β-blockers). α-blockers interact with α1 and α2 subtypes of α-adrenoceptors.
Nonselective α-blockers: Nonselective α-blockers contain haloalkylamine or imidazoline moieties. Phenoxybenzamine, with a haloalkylamine...
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Disrupting Reconsolidation of Fear Memory in Humans by a Noradrenergic β-Blocker
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Bizarre images and beta-adrenergic blocking agents: a unique case report.

R H Rosenman1, J D Maser

  • 1Department of Medicine, Mount Zion Medical Center, University of California, San Francisco, USA.

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Summary

Beta-adrenergic blocking agents can cause vivid imagery and hallucinations. This study documents this side effect using artistic illustrations for clarity.

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Area of Science:

  • Pharmacology
  • Neuroscience
  • Ophthalmology

Background:

  • Beta-adrenergic blocking agents are commonly prescribed for cardiovascular conditions.
  • Ocular side effects of beta-blockers are known, but visual disturbances like hallucinations are less commonly reported.

Observation:

  • Patients using beta-adrenergic blocking agents have occasionally reported experiencing vivid imagery and hallucinations.
  • These visual disturbances represent a potential, albeit uncommon, adverse effect of these medications.

Findings:

  • The study documents the occurrence of vivid imagery and hallucinations in patients treated with beta-adrenergic blocking agents.
  • Illustrations by a commercial artist visually represent these reported side effects.

Implications:

  • Increased awareness among clinicians regarding potential visual side effects of beta-blockers is warranted.
  • Further research may explore the neurobiological mechanisms underlying these visual disturbances.
  • Patient education on potential side effects can improve medication adherence and management.