α-Adrenergic antagonists, known as α-blockers, exert their effects by inhibiting α-adrenoceptors, leading to specific physiological actions. α1-blockers and α2-blockers have distinct pharmacological actions and therapeutic applications.

α1-blockers: These drugs inhibit α1-adrenoceptors on smooth muscle cells, resulting in vasodilation. This vasodilation lowers blood pressure, making α1-blockers valuable in treating hypertension. Additionally, α1-blockers effectively address urinary obstruction caused by benign prostatic hyperplasia (BPH). These drugs reduce urine flow resistance and alleviate BPH-related symptoms by relaxing smooth muscles in the prostate and bladder neck.

α2-blockers: These antagonists act on presynaptic α2-adrenoceptors, increasing sympathetic neurotransmitters' release. This promotes adrenoceptor activation in target organs. However, non-selective α-blockers interacting with both α1 and α2 receptors are generally not used for hypertension management due to their severe side effects.

Overall, adrenergic antagonists, particularly α1-blockers, play a crucial role in modulating the sympathetic nervous system and offer therapeutic benefits for conditions such as hypertension and urinary obstruction associated with BPH.

Tags
Adrenergic Antagonistsreceptor BlockersPharmacological Actions1 blockers2 blockersVasodilationHypertension TreatmentUrinary ObstructionBenign Prostatic Hyperplasia BPHSympathetic NeurotransmittersNon selective blockersTherapeutic Applications

Del capítulo 6:

article

Now Playing

6.12 : Adrenergic Antagonists: Pharmacological Actions of ɑ-Receptor Blockers

Drugs Acting on Autonomic Nervous System: Adrenergic Agonists and Antagonists Agents

417 Vistas

article

6.1 : Neuronas Adrenúdicas: Neurotransmisión

Drugs Acting on Autonomic Nervous System: Adrenergic Agonists and Antagonists Agents

2.9K Vistas

article

6.2 : Receptores Adrenérgicos (Adrenoceptores): Clasificación

Drugs Acting on Autonomic Nervous System: Adrenergic Agonists and Antagonists Agents

1.8K Vistas

article

6.3 : Receptores adrenérgicos: ɑ Subtipo

Drugs Acting on Autonomic Nervous System: Adrenergic Agonists and Antagonists Agents

1.2K Vistas

article

6.4 : Receptores adrenérgicos: subtipo β

Drugs Acting on Autonomic Nervous System: Adrenergic Agonists and Antagonists Agents

1.3K Vistas

article

6.5 : Agonistas adrenérgicos: agentes de acción directa

Drugs Acting on Autonomic Nervous System: Adrenergic Agonists and Antagonists Agents

1.1K Vistas

article

6.6 : Agonistas adrenérgicos: agentes de acción indirecta

Drugs Acting on Autonomic Nervous System: Adrenergic Agonists and Antagonists Agents

1.3K Vistas

article

6.7 : Agonistas adrenérgicos: agentes de acción mixta

Drugs Acting on Autonomic Nervous System: Adrenergic Agonists and Antagonists Agents

524 Vistas

article

6.8 : Agonistas adrenérgicos: química y relación estructura-actividad

Drugs Acting on Autonomic Nervous System: Adrenergic Agonists and Antagonists Agents

2.3K Vistas

article

6.9 : Agonistas adrenérgicos: clasificación terapéutica

Drugs Acting on Autonomic Nervous System: Adrenergic Agonists and Antagonists Agents

511 Vistas

article

6.10 : Agonistas adrenérgicos: usos terapéuticos

Drugs Acting on Autonomic Nervous System: Adrenergic Agonists and Antagonists Agents

597 Vistas

article

6.11 : Antagonistas adrenérgicos: química y clasificación de los bloqueadores de los receptores ɑ

Drugs Acting on Autonomic Nervous System: Adrenergic Agonists and Antagonists Agents

661 Vistas

article

6.13 : Antagonistas adrenérgicos: química y clasificación de los bloqueadores de los receptores de β

Drugs Acting on Autonomic Nervous System: Adrenergic Agonists and Antagonists Agents

394 Vistas

article

6.14 : Antagonistas Adrenérgicos: Acciones Farmacológicas de los Bloqueadores de los Receptores β

Drugs Acting on Autonomic Nervous System: Adrenergic Agonists and Antagonists Agents

411 Vistas

article

6.15 : Antagonistas adrenérgicos: bloqueadores de los receptores ɑ y β

Drugs Acting on Autonomic Nervous System: Adrenergic Agonists and Antagonists Agents

314 Vistas

See More

JoVE Logo

Privacidad

Condiciones de uso

Políticas

Investigación

Educación

ACERCA DE JoVE

Copyright © 2025 MyJoVE Corporation. Todos los derechos reservados