Source of information: Drugbank (External Link). Last updated on: 3rd July 18
*Trade Name used in the content below may not be the same as the HSA-registered product.
Active Ingredient / Synonyms
1-((1-Methylethyl)amino)-3-(1-naphthalenyloxy)-2-propanol | 1-(isopropylamino)-3-(1-naphthyloxy)propan-2-ol | beta-Propranolol | Propanalol | Propanolol | Propranolol | Propranololo | Propranololum | β-Propranolol | Propranolol |
A widely used non-cardioselective beta-adrenergic antagonist. Propranolol is used in the treatment or prevention of many disorders including acute myocardial infarction, arrhythmias, angina pectoris, hypertension, hypertensive emergencies, hyperthyroidism, migraine, pheochromocytoma, menopause, and anxiety. [PubChem]
For the prophylaxis of migraine.
Mechanism of Action
Propranolol competes with sympathomimetic neurotransmitters such as catecholamines for binding at beta(1)-adrenergic receptors in the heart, inhibiting sympathetic stimulation. This results in a reduction in resting heart rate, cardiac output, systolic and diastolic blood pressure, and reflex orthostatic hypotension.
Propranolol, the prototype of the beta-adrenergic receptor antagonists, is a competitive, nonselective beta-blocker similar to nadolol without intrinsic sympathomimetic activity. Propanolol is a racemic compound; the l-isomer is responsible for adrenergic blocking activity.
Propranolol is almost completely absorbed from the GI tract; however, plasma concentrations attained are quite variable among individuals.
* 4 L
Propranolol is extensively metabolized with most metabolites appearing in the urine.
Symptoms of overdose include bradycardia, cardiac failure, hypotension, and brochospasm. LD50=565 mg/kg (orally in mice).
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