IV Magnesium - GINA / NIH Guidelines 2004 IV Magnesium should not be used routinely in acute asthma exacerbations, but can help reduce hospital admission rates in selected groups of patients : - Adults with FEV1 25 – 30% pred at presentation - Adults who fail to improve above 60% pred after 1 hour Evidence A IV Magnesium is usually given at a single 2-g infusion over 20 min
One study isotonic Mg as an adjuvant to nebulized salbutamol, further studies‌
Idem BTS British Thoracic Society Asthma Guidelines 2003 / www.sign.ac.uk