A randomized double blind placebo controlled clinical evaluation of extract of Andrographis paniculata (KalmCold) in patients with uncomplicated upper respiratory tract infection.
Phytomedicine. 2010 Mar;17(3-4):178-85. doi: 10.1016/j.phymed.2009.12.001. Epub 2010 Jan 25.
Phytomedicine. 2010.
PMID: 20092985
Clinical Trial.