Professional and Linguistic Assessments Board (PLAB) Practice Exam

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What is the adult dosage for adrenaline in an emergency situation?

0.5ml in 1000
1.0ml in 1000
0.3ml in 1000
0.15ml in 1000

The correct answer is: 0.5ml in 1000

In an emergency situation, the standard adult dosage for adrenaline, particularly in the context of anaphylaxis or cardiac arrest, is typically 0.5 ml of a 1:1000 solution. This concentration means there are 1,000 micrograms (or 1 mg) of adrenaline in every milliliter. Administering this dose allows for immediate action on the cardiovascular and respiratory systems, helping to counteract severe allergic reactions or to support heart function during resuscitation efforts. This dosage is specifically designed to strike a balance between efficacy and safety, facilitating a rapid physiological response while minimizing potential adverse effects. In cases where higher concentrations might be used for other populations or situations, the proportions for adults follow established guidelines that recommend this specific dose. Understanding this dosing context is critical for managing emergencies effectively and highlights the importance of familiarity with medication concentrations and their indications during critical situations.