Mucoactive agents for adults with acute lung conditions: A systematic review.

Abstract Background and objectives Inhaled mucoactive agents are used to enhance airway clearance, however efficacy and safety are unclear in adults with acute respiratory conditions. Methods We systematically reviewed randomized controlled trials assessing respiratory function; safety; length of stay (LOS); mucus; radiology; and oxygenation. Results No adverse events were reported for dornase alfa ( n  = 63), N-acetylcysteine (NAC, n  = 50), ambroxol ( n  = 140), hypertonic saline ( n  = 33), heparin ( n  = 384), mannitol ( n  = 20) or isotonic saline. During invasive ventilation, NAC, dornase alfa and saline had no effect on mucus. Postoperatively, mucus characteristics improved with NAC ( n  = 10). Ambroxol lowered LOS (mean difference 4 days) and halved complications following lung carcinoma resection ( n  = 140). Heparin improved ventilator-free days ( n  = 130, mean difference 3.9–4.6) and intensive care LOS ( n  = 223, 3.2 days), but not ventilator-acquired pneumonia. Conclusion Dornase alfa, hypertonic saline and NAC were ineffective for atelectasis/mucus plugging while intubated. More data are required to support using NAC, ambroxol and heparin during acute illness.