» Procaine and Tetracaine Hydrochlorides and Levonordefrin Injection is a sterile solution of Procaine Hydrochloride, Tetracaine Hydrochloride, and Levonordefrin in Water for Injection. It contains not less than 95.0 percent and not more than 105.0 percent of the labeled amount of procaine hydrochloride (C₁₃H₂₀N₂O₂·HCl), not less than 95.0 percent and not more than 105.0 percent of the labeled amount of tetracaine hydrochloride (C₁₅H₂₄N₂O₂·HCl), and not less than 90.0 percent and not more than 110.0 percent of the labeled amount of levonordefrin (C₉H₁₃NO₃).