S.C. Code Ann. § 44-53-373: Authorized users of xylazine.

Nothing in this article applies to veterinarians in connection with the practice of their profession and the legitimate use of xylazine within the veterinary practice, including:

(A) the distribution or possession of xylazine by a licensed veterinarian for use in legitimate veterinary practice;

(B) the possession of xylazine pursuant to a valid prescription from a licensed veterinarian; or

(C) the possession of xylazine in an injectable form for use in nonhuman species.