#TestIt Alert: Substance in unspecified form sold in Knoxville, TN as heroin but actually contains caffeine, diphenhydramine, an unidentified chemical, acetaminophen, and fentanyl

By: Rachel Clark, Private Contractor Two pieces of cotton soaked in the residue from a spoon and cooker that were used to inject a sample sold as heroin were submitted from Knoxville, TN, and were found to contain caffeine, diphenhydryamine (Benadryl), an unidentified chemical, acetaminophen, and fentanyl.  The sample turned brown in the presence of the Marquis reagent, brown in the presence of the Mecke reagent, and didn’t react (though, due to the color of the submission, may have turned black) in the presence of the Mandelin reagent.  Caffeine is the world’s most widely consumed psychoactive substance. It produces a multi-hour stimulation,...