Background: Tramadol is mainly used for the treatment of moderate to severe pain. It synergistically combines two distinct mechanisms of action, being a selective agonist for mu-opioid receptors (MOR) and inhibiting serotonin and noradrenaline reuptake, which improves its analgesic and safety profile [1]. However, it is not devoid of neurobehavioral toxicity potential [2], whose molecular alterations are not fu...