Topicality. Recently, more and more works on the hepatotoxicity of NSAIDs have appeared in the literature. Presumably, all NSAIDs have hepatotoxicity, but the degree of adverse effects on the liver in different drugs is variable. Aim. To study the effect of different generations of NSAIDs on the functional state of the liver of the experimental animals. Materials and methods. Diclofenac sodium, piroxicam, indomethacin, meloxicam and celecocosib were selected for the comparative study. Changes in the functional state of the liver of intact rats during subchronic administration of the drugs selected, as well as their impact on the course of the model hepatitis were determined. The state of the liver was determined by the following indicators: the mass coefficient of the liver, the activity of alanine aminotransferase, alkaline phosphatase, the content of total protein, urea, cholesterol in the blood serum, the level of TBA-active products, diene conjugates, reduced glutathione, catalase and glycogen in the liver homogenate. Results and discussion. It was found that diclofenac, piroxicam, indomethacin in the doses of ED50 by the antiexudative activity when used for 14 days adversely affected the liver of intact animals, as well as worsened the course of the model hepatitis, i.e. had a pronounced hepatotoxic effect. Meloxicam and celecoxib did not show a pronounced adverse effect in the carbon tetrachloride hepatitis, but contributed to the deterioration of the functional state of the liver of intact rats, i.e. had a moderate hepatotoxic effect. Conclusions. By the level of hepatotoxicity the drugs studied can be arranged as follows: diclofenac > indomethacin > piroxicam > meloxicam > celecoxib.