CA SB6

Adds xylazine (an animal sedative known as "tranq" or "zombie drug") to the list of Schedule III controlled substances in California, making its unauthorized possession, sale, and use subject to criminal penalties

Creates an exception allowing xylazine to be used for compounding animal drugs when FDA-approved xylazine products are not available for sale in California, protecting legitimate veterinary uses

Excludes testing equipment designed to detect the presence of xylazine from the definition of drug paraphernalia, allowing harm reduction testing alongside existing exemptions for fentanyl, ketamine, and GHB test strips

Responds to xylazine increasingly appearing as an adulterant in illicit drugs, particularly fentanyl, which enhances fentanyl's effects and creates overdoses that cannot be reversed with naloxone

Implements the bill as a state-mandated local program due to the creation of new crimes, though no state reimbursement to local agencies is required