» Xylazine Injection is a sterile solution of Xylazine in Water for Injection prepared with the aid of Hydrochloric Acid or a sterile solution of Xylazine Hydrochloride in Water for Injection. It contains the equivalent of not less than 90.0 percent and not more than 110.0 percent of the labeled amount of xylazine (C₁₂H₁₆N₂S).