» Procaine Hydrochloride and Epinephrine Injection is a sterile solution of Procaine Hydrochloride and Epinephrine Hydrochloride in Water for Injection. The content of epinephrine does not exceed 0.002 percent (1 in 50,000). It contains not less than 95.0 percent and not more than 105.0 percent of the labeled amount of procaine hydrochloride (C₁₃H₂₀N₂O₂·HCl), and not less than 90.0 percent and not more than 115.0 percent of the labeled amount of epinephrine (C₉H₁₃NO₃).