In the paper entitled "The Synergistic Interaction Between Midazolamand Clonidine in Spinally-Mediated Analgesia in Two DifferentPain Models of Rats" by Nishiyama and Hanaoka (Anesth Analg2001; 93:102531), it should have been noted that thedata concerning clonidine alone and midazolam alone were basedon previously published data in "The Analgesic Interaction BetweenIntrathecal Clonidine and Glutamate Receptor Antagonists" (AnesthAnalg 2001; 92:72532) and in "Synergistic Analgesic Effectsof Intrathecal Midazolam" (Canadian Journal of Anesthesia 2001;48:28894). The authors regret this oversight.