Efficacy and tolerability of a fluid extract combination of thyme herb and ivy leaves and matched placebo in adults suffering from acute bronchitis with productive cough. A prospective, double-blind, placebo-controlled clinical trial.
Arzneimittelforschung. 2006;56(9):652-60. doi: 10.1055/s-0031-1296767.
Arzneimittelforschung. 2006.
PMID: 17063641
Clinical Trial.