Tramadol Toxicity and Its Implications for Brain Disorders: A Narrative Review

Tramadol is widely used in the management of moderate to moderately severe pain due to its unique dual mechanism of action as a weak μ-opioid receptor agonist and as an inhibitor of serotonin and norepinephrine reuptake. However, it seems that this medication may possess neurotoxicity, especially in misuse, overdose, or chronic use. This review highlights current knowledge on the neurotoxic effects of tramadol, outlining the mechanisms of both its acute and chronic effects on seizure induction, serotonin syndrome, oxidative stress, neuroinflammation, and neurotransmitter dysregulation. Patients susceptible to the adverse effects from such neurotoxicity-geriatric, pediatric, or with previous neurological disorders-also come into focus, with personalized clinical approaches being recommended. It also touches on the possible connections of chronic tramadol use with neurodegenerative disorders such as Alzheimer's and Parkinson's diseases and gives the implications for public health and clinical practice. The future directions of research are outlined: large-scale epidemiological studies, biomarker development, alternative pain management strategies, and enhanced regulatory frameworks. This review therefore addresses these gaps to guide safer use of tramadol and improving our understanding of its long-term consequences on brain health.