Echinaceafor Preventing and Treating the Common Cold

Clinical Question

AreEchinaceaproducts associated with a reduced incidence and a shorter duration of common colds compared with placebo?

Bottom Line

Individual prophylaxis trials show no association with prevention of the common cold, but exploratory meta-analysis suggests thatEchinaceaproducts may be associated with a small reduction in cold incidence. In treatment trials, there was no association...