Benzodiazepine Dependence: Clinical and Molecular Aspects, Preventive Strategies and Therapeutic Approaches

Benzodiazepines (BZDs) are globally prevalent psychotropic substances valued for their anxiolytic, hypnotic, anticonvulsant, and myorelaxant properties. Pharmacologically, they act as positive allosteric modulators of the ionotropic GABA_A receptor, enhancing inhibitory synaptic transmission. However, prolonged use poses a significant public health concern, risking adverse effects such as cognitive impairment, motor incoordination, tolerance, and physical dependence. The development of tolerance is mediated by complex neurobiological changes, notably the downregulation of GABA_A receptor subunits and a compensatory sensitization of excitatory glutamatergic systems. Effective management of established dependence requires comprehensive psychological intervention coupled with pharmacological substitution (switching to a long-acting BZD) and gradual dose tapering. Preventive measures are complex, emphasizing short-term prescriptions, minimum effective dosing, and selecting non-pharmacological or alternative pharmacological agents, such as SSRIs/SNRIs, to mitigate the risk of developing tolerance and dependence. This expert review aims to compile the most relevant, representative, and recent literature summarizing the pharmacology, clinical indications, adverse effects, misuse, and abuse of BZDs that ultimately lead to BZD use disorder (BUD). It also details the involved neurobiological mechanisms and discusses critical preventive and therapeutic strategies, providing readers with the main aspects to consider for addressing this global public health problem.