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Paper   IPM / Cognitive Sciences / 8829
School of Cognitive Sciences
  Title:   Involvement of Amlodipine, Diazoxide, and Glibenclamide in Development of Morphine Tolerance in Mice
  Author(s): 
1.  M.R. Zarrindast
2.  M. Sahebgharani
3.  A. Khalilzadeh
4.  M. Anvari
5.  O. Khalilzadeh
  Status:   Published
  Journal: Int J Neurosci
  Vol.:  118
  Year:  2008
  Pages:   503-18
  Supported by:  IPM
  Abstract:
In this study, the effects of the calcium channel blocker (amlodipine), potassium channel opener (diazoxide), and potassium channel blocker (glibenclamide) on the development of morphine-induced tolerance in the formalin test was investigated. During development of tolerance to morphine, intraperitoneal (i.p.) administration of different doses of amlodipine (5, 7.5 and 10 mg/kg) or diazoxide (1, 5 and 10 mg/kg) in combination with morphine (20 and 30 mg/kg) increased tolerance in the first and second phase of the test. However, glibenclamide (2.5, 5, and 10 mg/kg) decreased morphine tolerance in the second phase of formalin test. It is concluded that calcium and potassium channel mechanisms may be involved in the morphine tolerance.

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