The Korean Journal of Pain

The Korean Pain Society (대한통증학회)
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The Combined Antiallodynic Effect of Gabapentin and Milnacipran in a Rat Neuropathic Pain Model

흰 쥐의 신경병증성 통증 모델에서 Gabapentin과 Milnacipran의 병용 효과

  • Lee, Hyeon Jeong (Department of Anesthesia and Pain Medicine, Pusan National University) ;
  • Shin, Sang-Wook (Department of Anesthesia and Pain Medicine, Pusan National University) ;
  • Jang, Hee Jeong (Department of Anesthesia and Pain Medicine, Pusan National University)
  • 이현정 (부산대학교 의학전문대학원 마취통증의학교실) ;
  • 신상욱 (부산대학교 의학전문대학원 마취통증의학교실) ;
  • 장희정 (부산대학교 의학전문대학원 마취통증의학교실)
  • Received : 2007.03.20
  • Accepted : 2007.05.30
  • Published : 2007.06.30
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Abstract

Background: Anticonvulsants and antidepressants are adjuvant analgesic drugs that are used widely for treating chronic neuropathic pain syndromes. The combined analgesic effect of gabapentin and milnacipran was investigated with a rat neuropathic pain model. Methods: The rat neuropathic pain model was made by ligating the spinal nerves (L5 and L6). An intrathecal catheter was inserted into the subarachnoid space. Tactile allodynia was tested with the up-down method using von Frey hair. We determined the antiallodynic effect of intraperitoneal (I.P.) and intrathecal (I.T.) gabapentin. The combined effect of I.P. gabapentin (50 mg/kg) and milnacipran (0, 10 and 30 mg/kg) was investigated. Results: Intraperitoneal and intrathecal administration of gabapentin increased the threshold for tactile allodynia (the ED50 was 60.6 mg/kg and $45.5{\mu}g$, respectively). Co-administration of I.P. milnacipran increased the antiallodynic effect of I.P. gabapentin in a dose-dependent fashion. Conclusion: The combined administration of milnacipran and gabapentin may increase the total analgesic effect during treatment of neuropathic pain.

Keywords

Acknowledgement

Supported by : 부산대학교

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