Explanation

• Ephedrine blocks which receptors:  Both Alpha & Beta
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• Ephedrine is a synthetic non catecholamine agonist at α, β1, and β2 receptors with both direct and indirect actions.
• Ephedrine is given as an intravenous bolus of 5 to 10 mg.
• It is effective in the same dose range when administered intramuscularly, albeit with slower onset and longer duration.