The effects of ladasten and reference product imipramine (10 mg/kg) on the content of cytokines TNF-α, IL-6, IL-10, IL-1α, IL-2, IL-4, IL-5, IL-17, IFN-γ, and GM-CSF and behavior of male C57Bl/6 mice were studied on the model of a depression-like state induced by a single intraperitoneal injection of bacterial LPS in a dose of 100 μg/kg. Ladasten was injected 5 times in doses of 30 and 50 mg/kg. LPS was administered 1 h after the last injection of the test agents. Behavioral disturbances and significant increase in the concentration of TNF-α and IL-6 in blood plasma were observed 2 h after LPS treatment. Ladasten was more potent than imipramine in decreasing the content of proinflammatory cytokines TNF-α and IL-6 and preventing the development of behavioral disturbances in mice. Antiasthenic drug ladasten was shown to decrease the elevated level of proinflammatory cytokines TNF-α and IL-6 after LPS treatment. Further studies should be performed to develop new indications for the use of ladasten in adjuvant therapy of depression.