Kare

Kold Kare by Kare-n-Herbs is a natural herbal supplement for colds, flu, and sinusitis. The active ingredient in Kold Kare is andrographis paniculata which, according to the Kare-n-herbs website "has proven to be an effective prophylactic against the common cold, flu and sinusitis." I have used this for a couple of years and it seems help shorten cold and flu duration.