Rudolf M, Riordan J F, Grant B J, Maberly D J, Saunders K B
Br J Dis Chest. 1978 Oct;72(4):307-12.
Fourteen patients with acute severe asthma necessitating hospital admission were all treated with a standard therapeutic regimen, and in addition received either bromhexine or placebo (initially intravenously and subsequently orally) double-blind. We were unable to show any significant improvement in the rate of recovery of the bromhexine-treated group, in terms of either arterial blood gases or change in peak expiratory flow rates.