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[Biological aspects of treatment resistance in psychiatry and pharmacodynamic approaches to its management].

Treatment resistance is a persistent neurochemical condition characterized by the presence of «hybrid» metabolism, which combines both pathological and drug-dependent metabolisms. The difficulties in management and prevention of treatment resistance are associated with a lack of understanding of neurochemical aspects of the development of higher mental functions. The authors suggest that the basic types of species-preserving behavior are associated with the activity of monoaminergic systems while the modulation of their activity is predetermined by local neuronal networks in the rostral parts of the brain, where a variety of co-transmitters play an important role. It is emphasized that the mechanisms of the development of resistance after previous treatment with agonists (antidepressants, anxiolytics) or antagonists (antipsychotics) are different. Depending on drug actions on synaptic transmission, methodological aspects of treatment resistance management by means of «polar therapy», «sensitization» and combination strategies are considered.