Most US deaths from cannabis - related illness involved products containing tetrahydrocannabinol ( THC ) , according to data from the Centers for Disease Control and Prevention ( CDC ) . And in New York, the state Department of Health commissioner has said the vast majority of the 125 cases there have been linked to black market THC cartridges. Of the 19 deaths included in the study , 84 % of victims had used cannabis products , while 14 % had exclusively used cannabis products . Cannabis use might have been under - reported because it remains illegal in some states , CDC noted . THC is the main psychoactive compound in marijuana . Health officials are unsure about how the deaths have occurred , but they have identified a possible fault in vape cartridges ' pre - processed liquids .
Most US deaths from cannabis - related illness involved products containing tetrahydrocannabinol ( THC ) , according to data from the Centers for Disease Control and Prevention ( CDC ) . Of the 19 deaths included in the study , 84 % of victims had used cannabis products , while 14 % had exclusively used cannabis products . Cannabis use might have been under - reported because it remains illegal in some states , CDC noted . THC is the main psychoactive compound in marijuana . Health officials are unsure about how the deaths have occurred , but they have identified a possible fault in vape cartridges ' pre - processed liquids .