Drug Groups

approved

Description

Isopropyl analog of epinephrine; beta-sympathomimetic that acts on the heart, bronchi, skeletal muscle, alimentary tract, etc. It is used mainly as bronchodilator and heart stimulant. [PubChem]

Indication

For the treatment of mild or transient episodes of heart block that do not require electric shock or pacemaker therapy also used in management of asthma and chronic bronchitis

Pharmacology

Isoproterenol is a relatively selective beta2-adrenergic bronchodilator. Isoproterenol is indicated for the relief of bronchospasm associated with chronic obstructive pulmonary disease. The pharmacologic effects of beta adrenergic agonist drugs, including Isoproterenol, are at least in part attributable to stimulation through beta adrenergic receptors of intracellular adenyl cyclase, the enzyme which catalyzes the conversion of adenosine triphosphate (ATP) to cyclic- 3',5'- adenosine monophosphate (c-AMP). Increased c-AMP levels are associated with relaxation of bronchial smooth muscle and inhibition of release of mediators of immediate hypersensitivity from cells, especially from mast cells.

Affected Organisms

Elimination

Excretion following inhalation administration is primarily renal and the major metabolite is the sulfate conjugate of isoproterenol.

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