Mice were fully anesthetized by intraperitoneal injection of ketamine and xylazine, and their abdominal skin was shaved using a hair-clipper before powder delivery. For EI, the PowderJect ND ...

“DEA has seized xylazine and fentanyl mixtures in 48 of 50 States. The DEA Laboratory System is reporting that in 2022 approximately 23% of fentanyl powder and 7% of fentanyl pills seized by the ...