Objective: Opioid dependence is a chronic and complex disorder characterized by relapse remission. Chronic administration of morphine causes symptoms physical psychological dependence. The purpose the present study was to investigate effect anti-addictive drugs such as bupropion varenicline on naloxone precipitated withdrawal syndrome in rat model. Materials Methods: To assess morphine, Wistar ...

background: chronic administration of morphine cause physical dependence but the exact mechanism of this phenomenon remains unclear. the aim of this study is the assessment of systemic and intracerebroventricular (icv) administration of ramelteon (a melatonin receptor agonist) on morphine physical dependence. methods: 88 adult male rats were divided into 2 major groups, namely “systematic” and ...

EphB receptor tyrosine kinases, which play important roles in synaptic connection and plasticity during development and in matured nervous system, have recently been implicated in processing of pain after nerve injury and morphine dependence. Subtypes of the EphB receptors that may contribute to the neuropathic pain and morphine dependence have not been identified. Here we demonstrate that the ...

introduction: topiramate is a newly anti-convulsant drug, which acts as nmda glutamate receptor antagonist as well as the gabab receptor agonist. it is used for physical dependence to opioids as well as cocaine, nicotine, alcohol and ecstasy dependence. in the present study attempts were made to further identification of the effects of topiramate on the acquisition and expression of morphine-in...

Previous experiments have shown that mice lacking a functional delta-opioid receptor (DOR-1) gene do not develop analgesic tolerance to morphine. Here we report that mice lacking a functional gene for the endogenous ligand preproenkephalin (ppENK) show a similar tolerance deficit. In addition, we found that the DOR-1 and ppENK knock-outs as well as the NMDA receptor-deficient 129S6 inbred mouse...

Previous pharmacological studies have implicated serotonergic brain systems in opiate withdrawal syndrome. Increased brain 5-HT release is associated with the development of physical dependence to morphine. Specific serotonin reuptake inhibitors, such as fluvoxamine and sertraline reduce the severity of naloxone precipitated opioid withdrawal syndrome. Other studies have shown that 5-HT system ...

background exposure to morphine decreases neurogenesis in the hippocampus. recent studies have shown that voluntary running decreases the severity of anxiety behaviors and cognitive deficits, and increased synaptic plasticity in morphine-dependent rats. objectives this study aimed to investigate whether the morphine dependence-induced attenuation of hippocampal neuron number in rats would be re...

background and objective: today, opioids are used to control and relieve acute and chronic pain. however, the incidence of both tolerance and dependence phenomena for these drugs is a major problem. so, in this study, the combination effect of haloperidol and methadone on the acquisition and expression of morphine dependence and tolerance was examined.    materials and methods: ninety-eight mic...

conclusions the results of this study in terms of personality disorders and types of used drugs were in accordance with the previous studies results. it is necessary to design appropriate treatment plans for medical treatment of those with personality disorders. results there was a significant correlation between stimulant use and histrionic personality disorder (p < 0.001) and antisocial and n...

Diabetes is one of the most common diseases in all societies including Iran. One of its important complications is the neuropathic pain, which can be relieved by opioid drugs such as morphine. Opioid therapy is restricted due to development of tolerance and physical or mental dependence. In this study, the effect of diabetes on morphine analgesia and development of morphine tolerance and depend...