Ace the Ontario Paramedic Practice Exam 2026 – Sprint to Success and Save Lives!

For a severe allergic reaction, commonly known as anaphylaxis, the correct dose of epinephrine for adults is typically between 0.3 to 0.5 mg. This dosage is effective in counteracting the severe symptoms associated with anaphylaxis, such as airway constriction and cardiovascular instability. Administering epinephrine helps to rapidly reverse the effects of the allergic reaction by stimulating alpha and beta-adrenergic receptors, leading to vasoconstriction, bronchodilation, and increased heart rate, among other physiological responses.

In the event of anaphylaxis, it is important to administer the epinephrine intramuscularly, usually in the mid-anterolateral thigh, for optimal absorption and efficacy. The 0.3 to 0.5 mg range is the most widely accepted and recommended dosage in clinical practice and guidelines for adults experiencing a severe allergic reaction. This dose may be repeated every 5 to 15 minutes if symptoms persist, depending on the severity of the reaction and the clinical response of the patient.

Dosing outside of the recommended range, such as doses lower than 0.3 mg or higher than 0.5 mg, may not provide the necessary impact or could lead to adverse effects