According to a recently released report, "kratom use appears to be increasing in the United States, and the reported medical outcomes and health effects suggest an emerging public health threat."  The July 29th, 2016 article, "Notes from the Field: Kratom Exposures Reported to Poison Centers, United States 2010-2015," describes kratom exposures reported to poison centers and overall trends of usage in the United States. Kratom is a plant known for its stimulant effects and as an opioid substitute.