An Act amending the act of April 14, 1972 (P.L.233, No.64), known as The Controlled Substance, Drug, Device and Cosmetic Act, further providing for schedules of controlled substances and for secure storage of xylazine; and adding provisions relating to medetomidine.

SB 866 amends Pennsylvania's Controlled Substance Act to add medetomidine (a veterinary sedative) to Schedule III, while clarifying specific exemptions for its legal use in animal medicine. It directly affects veterinarians, animal drug manufacturers, and pharmacists who handle medetomidine for approved veterinary purposes, such as FDA-approved animal drugs or compounding. Key provisions include exempting medetomidine from Schedule III control when used for nonhuman species under federal approval (21 U.S.C. § 360b), for animal drug manufacturing, or by licensed professionals. The bill also requires veterinarians to store medetomidine and xylazine securely, following existing pharmacy storage rules under the Pharmacy Act.