… veterinary-grade xylazine. Also present were boxes of the opioid overdose reversal drug Narcan, one of which was … the contents as a mixture of cocaine, xylazine (a non-opioid veterinary sedative), lidocaine, and BTMPS (an … in fentanyl-involved overdoses. Because xylazine is a non-opioid drug, it is not responsive to Narcan. Special …