Metabolites of the anticonvulsant m-CL-BHU in the process of detoxification on cytochrome P-450 are conjugated with endogenous macromolecules and form a complete stimulus for the immune system. Specific activation occurs at the time of the decrease in the activity of liver microsomal monooxygenases. This protection function is valuable in maintaining “immuno-chemical homeostasis” in the body.