Local anesthetics, such as lidocaine or levobupivacaine, which we use in our procedures, have their own antibacterial effects [1], and their antibacterial effects have already been identified in previous studies [2]. All of our procedures can cause various complications, such as infection, bleeding, dura puncture, and post intervention pain. Though there is no report on overall incidence of infection, which is one of the complications, it is reported that the incidence rate of in-fectious spondylodiscitis after spine surgery is 0.05-5.3% [3].And in very rare cases, there has been a psoas abscess after injection at the pain trigger point of the spinal muscle [4].Based on these findings, although infection is not common, it is an important complication to be avoided because of the variety of sites and features. Causes of infection include air contamination, carelessness of the operator, blood circulation of the primary infection, and the most common cause during the procedure is contamination of the needle entry path due to patient skin contamination. Though local anesthetics we

Lidocaine is a cost-effective drug that is widely used for local and regional anesthesia. However, central nervous system (CNS) toxicity can occur when lidocaine is administered above the maximum recommended dose (approximately 4.5 mg/kg) or if lidocaine is injected intravascularly rather than administered locally. Systemic toxicity by lidocaine has been reported in several studies. However, psychotic reactions due to lidocaine have been rarely reported; furthermore, reports of lidocaine-related euphoria are very rare. We report a very rare case of euphoria caused by CNS toxicity that occurred during the local administration of lidocaine at the therapeutic dose. Therefore, anesthesiologists should be aware of the severe side effects of local anesthetics despite administering the appropriate dosage at the appropriate location. Future studies should investigate pharmacokinetics to determine the safety profile of local anesthetics.