Background. Intoxication syndrome (IS) is one of the most common syndromes in the medical practice, but its exact scientific outline has not yet been established. This is due to a variety of toxic factors, a large polymorphism of symptoms, and complex interactions between the processes of toxin production and detoxification. Objective. To describe the main features of IS and its treatment. Materials and methods. Analysis of literature sources on this issue. Results and discussion. The morphological basis of IS is the subcellular interaction between the toxin and the receptor. IS develops if the toxins’ entry or formation outweigh their elimination. Intoxications are divided into exogenous and endogenous. The diagnostic criteria for exogenous intoxications are the contact of the patient with the substance that caused the intoxication and the corresponding damage to the organs. Exogenous intoxications have a clear clinical picture, and the introduction of specific antidotes or antitoxins is the best treatment. In turn, endogenous IS is mediated by the accumulation of bacterial endotoxins, excess amounts of physiological metabolic products, biologically active substances and mediators. Natural ways of detoxification include metabolism, excretion and immune mechanisms. Infusion detoxification (IDT) with a significant load by crystalloids and multicomponent drugs is a mandatory treatment for both exogenous and endogenous IP. In most cases, the volume of infusion should be 25-35 ml/kg body weight. Requirements for the ideal drug for detoxification include hypervolemia, improving microcirculation and rheological properties of blood, correction of electrolyte disorders and disorders of acid-base balance, increase of diuresis and peristalsis. All these effects are typical for Reosorbilact (“Yuria-Pharm”). In general, the IDT program may include classical and balanced crystalloids (800-1500 ml), Reosorbilact (600-800 ml), specialized solutions (100-200 ml), and symptomatic drugs. The optimal duration of treatment with Reosorbilact is 7 days. Conclusions. 1. Exact scientific characteristics of IS are still missing. 2. IDT is the mandatory method of treatment of exogenous and endogenous IS. 3. Reosorbilact is the main component of IDT in any IP, as it affects the main links of the pathogenesis of the latter.