Lethal dose of fentanyl VS heroin VS carfentanyl: https://www.scripps.edu/news-and-events/press-room/2021/20210203-janda-carfentanil.html https://www.scripps.ed

Lethal dose of fentanyl VS heroin VS carfentanyl: https://www.scripps.edu/news-and-events/press-room/2021/20210203-janda-carfentanil.html https://www.scripps.edu/news-and-events/press-room/2021/2021... You need a very precise scale to measure those quantities...