Anaesthetic Index 4-hydroxybutanoic acid Arketamine Benzocaine Carfentanyl Chloroform Cocaine Diethyl ether Diphenhydramine Esketamine Fentanyl Ketamine Lidocaine Midazolam Morphine Nitrous oxide Phencyclidine Promethazine Propofol Rolicyclidine Sufentanyl