Metaraminol

Metaraminol is a potent vasopressor and alpha-1 adrenergic receptor agonist. It is commonly used in the treatment of hypotension, particularly in cases of septic shock and anaphylaxis. Metaraminol works by constricting the blood vessels, thereby increasing blood pressure.

Pharmacology

Metaraminol acts primarily on alpha-1 adrenergic receptors, causing vasoconstriction and an increase in systemic vascular resistance. This results in an increase in blood pressure. It also has mild beta-1 adrenergic effects, which can increase heart rate and cardiac output.

Clinical Uses

Metaraminol is used in the treatment of hypotension, especially in cases where the hypotension is due to septic shock or anaphylaxis. It is also used in some surgical procedures to maintain blood pressure.

Side Effects

Common side effects of metaraminol include palpitations, tachycardia, anxiety, and headache. Less common side effects can include chest pain, dyspnea, and arrhythmias.

Contraindications

Metaraminol is contraindicated in patients with hypertension, pheochromocytoma, and those with a history of hyperthyroidism.

Drug Interactions

Metaraminol can interact with other medications, including monoamine oxidase inhibitors, tricyclic antidepressants, and beta blockers.

Dosage

The dosage of metaraminol is determined by the patient's weight, medical condition, and response to treatment.

See Also

• Vasopressor
• Alpha-1 adrenergic receptor
• Hypotension
• Septic shock
• Anaphylaxis

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