. >> reporter: spice users like melvin scott line the streets of parts of tampa. he and his friends know right now it's life or death. >> od or death, they don't care. >> reporter: but right now there's good reason to. >> this year alone in the four days from saturday till today we've had 48 calls. >> reporter: 48 calls in the last four days. compare that to just 12 calls this time last year. >> wherever there are individuals that are not lucid it's anyone's game. >> reporter: dr. thomas peredy of the florida poison information says drug dealers have changed the ingredients causing the chaos. do we have an idea what this specific compound is? the answer is no. they may not know but melvin scott says he'll take his why not? >> i know how to do it. i stay active. >> reporter: all right. of course, any doctor would tell you that is absurd reasoning and law enforcement would tell you, of course, doing spice is against the law, jen. >> so obviously the recommendation, just don't do it, but this seems to sort of come out of the blue. could it happen yet again using? >>