Acetylfentanyl (Acetyl Fentanyl Powder) is an opioid analgesic drug that is an analog of fentanyl. Studies have estimated acetylfentanyl to be fifteen times more potent than morphine.
Carfentanil Powder is a synthetic opioid that is similar to, but 1,000 times more powerful than, fentanyl. Carfentanil is known to be used by veterinarians to sedate elephants and other large mammals.
Fentanyl Powder also spelled fentanil, is an opioid used as a pain medication and together with other medications for anesthesia. Fentanyl is also used as a recreational drug, often mixed with heroin or cocaine.