objective(s):neuropathic pain is caused by lesions or diseases affecting the somatosensory system and often responds poorly to typical medications.  in this study, we evaluated anti-nociceptive effects of morphine, gabapentin and their combination on heat hyperalgesia, cold and mechanical allodynia in chronic constriction injury (cci) model of neuropathic pain in rats. materials and methods: mo...

Background: Previous studies have confirm the effects of water extract of Crocus sativus on the euphoric and behavioral properties of morphine in mice. Objective: In the present study, the effects of intra-accumbal administration of alcohol extract of Crocus sativus stigma on the acquisition and expression of morphine-induced conditioned place preference (CPP) in male Wistar rats (250-300 g...

introduction: morphine addiction and morphine withdrawal syndrome are the two main problems of today’s human society. the present study has investigated the effects of nicotine on the strength of physical and psychological dependency in single and repeated doses morphine administrated rats. methods: male wistar rats were subjected to morphine consumption with single or frequent dose protocols. ...

Background: The amygdala is one of the nerve centers involved in drug reward. It is suggested that the central nucleus of the amygdala (CeA) is involved in morphine dependency. The CeA gamma-aminobutyric acid-ergic (GABAergic) system is a mediator of morphine rewarding effects. In this research, the effects of stimulation or inhibition of CeA GABA type B (GABAB) receptors on sensitization acqui...

In the present study, the effect of GABA (γ-aminobutyric acid) receptor agonists and antagonists on morphine-induced antinociception was investigated in formalin test in rats. Intraperitoneal (i.p.) injection of different doses of morphine (1, 3, 6 and 9 mg/kg) and intracerebroventricular (i.c.v.) injection of different doses of muscimol (0.5, 1 and 2 g/rat) or baclofen (0.25, 0.5 and 1 g/rat) ...

this study investigates the effectiveness of the antinociceptive effects of diclofenac, an nsaid, on the nociceptive behavior of morphine-treated rats on formalin test.rats were treated with morphine-containing drinking water for twenty one days, which induced morphine dependence. the antinociceptive effects of 8, 16, and 32 mg/kg doses of diclofenac were then evaluated and compared with distil...

BACKGROUND Morphine sulfate has long been used for analgesia, but clinical applications can be limited by side effects, tolerance, and potential for addiction at therapeutic doses. An agent that produces therapeutic analgesia when coadministered with low-dose morphine could have important clinical uses. The anticonvulsant agent gabapentin has been identified as having antihyperalgesic propertie...

in the present study the effects of both cck receptor agonists and antagonists on antinociception induced by morphine in the tail-flick test have been evaluated. m orphine induced dose-dependent antinociception in mice. the response of morphine was potentiated by sulfated cholecystokinin-8 (cck-8s) but not by unsulfated cholecystokinin-8 (cck-8u). the cck receptor antagonists mk-329 and l-365, ...