RT - Journal Article T1 - Comparing the Antinociceptive Effects of Methamphetamine, Buprenorphine, or Both After Chronic Treatment and Withdrawal in Male Rats JF - BCN YR - 2019 JO - BCN VO - 10 IS - 4 UR - http://bcn.iums.ac.ir/article-1-964-en.html SP - 313 EP - 322 K1 - Methamphetamine K1 - Buprenorphine K1 - Pain K1 - Hot plate K1 - Tail flick K1 - Interactions AB - Introduction: Methamphetamine (Meth) and Buprenorphine (BUP) modulate pain perception. However, the antinociceptive effects of their interactions, which affect through different systems, are unclear in rats. This study aimed to compare the analgesic effects of Meth, BUP, and their coadministration, as well as the effect of withdrawal from these substances on nociception in male rats. Methods: In this experiment, 40 male Wistar rats (weight: 250-300 g) were categorized into four groups: control, Meth, BUP, or BUP+Meth. After seven days of treatments, the antinociceptive effects were assessed using the hot plate and the tail flick tests. The differences among the groups were analyzed with ANOVA and Tukey’s post hoc tests. P values less than 0.05 were considered significant. Results: Meth and BUP increased the reaction times during the hot plate and tail flick tests. The combination of Meth and BUP increased reaction time more than Meth or BUP alone. Conclusion: The significantly high reaction times in rats treated with Meth and BUP indicate that these substances have antinociceptive effects. In addition, Meth enhanced the antinociceptive effects of BUP. These synergistic effects might occur through the dopaminergic, serotonergic, and or adrenergic systems. LA eng UL http://bcn.iums.ac.ir/article-1-964-en.html M3 10.32598/bcn.10.4.290.5 ER -