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FRCEM SBA (Final) Practice Questions - FRCEM SBA (Final) Examination Exam

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A 24-year-old woman presents with acute severe asthma. After initial salbutamol and ipratropium nebulisers and IV hydrocortisone she remains tachypnoeic with a PEF of 33% predicted. According to BTS/NICE/SIGN guidance, which is the MOST appropriate next pharmacological step?
Correct Answer:
IV magnesium sulfate 1.2–2 g over 20 minutes

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