The analgesic interaction of tramadol and morphine in rats: An isobolographic study

سال انتشار: 1398
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 65

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شناسه ملی سند علمی:

JR_VRFAN-10-1_005

تاریخ نمایه سازی: 25 آبان 1402

چکیده مقاله:

In order to assess possible synergistic antinociceptive interactions, the analgesic effects of intra-peritoneal tramadol and morphine administered either separately or in combination were determined using tail-flick latency test following exposure to radiant heat in rats. Groups of eight male Sprague-Dawley rats received either tramadol (۳.۹۰, ۷.۰۰, ۱۲.۵۰, and ۲۲.۲۰ mg kg-۱) and morphine (۱.۲۶, ۲.۲۵, ۴.۰۰ and ۷.۱۰ mg kg-۱) or a combination of tramadol and morphine (۴ different combinations). The baseline latency was obtained before drug injection for each rat, then at ۱۵, ۳۰, ۴۵, ۶۰ and ۷۵ min after injection. The effective dose (ED)۵۰ for either tramadol or morphine individually was ۱۱.۷۰ mgkg-۱ and ۲.۲۶ mg kg-۱, respectively. Based on isobolographic analysis, the ED۵۰ values obtained by drug combination were significantly less than the calculated additive values; which indicates that the co-administration of tramadol and morphine produces synergistic antinociception in the radiant heat tail-flick assay. Combination of morphine and tramadol administered intra-peritoneally can be used for the control of acute pain in rats.

نویسندگان

Hesam Savadkoohi

Department of Veterinary Clinical Sciences, School of Veterinary Medicine, Shiraz University, Shiraz, Iran

Nasser Vesal

Department of Veterinary Clinical Sciences, School of Veterinary Medicine, Shiraz University, Shiraz, Iran

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