In lumbar peridurography conducted in 117 patients with discogenic radiculitis complications occurred both in the stage of peridural anesthesia and after introduction of the radiocontrast medium. During anesthesia the dura mater was punctured in 4 patients, in another 2 patients dicaine penetrated into the subarachnoid space and caused spinal anesthesia with a high upper level. Peridural anesthesia with paralysis of the respiratory musculature developed in 1 patient. After the injection of the radiocontrast medium, spasm in the lower extremities and trunk of the type of spinal epilepsy developed in 4 patients. The clinical picture, prevention, and treatment of these complications are discussed.