The authors have used the 4560 R.P. (Rhodia Laboratories), intramuscularly, in dosis of 25 mg. and have analized the results according to its influence (a) in the basic electrical activity of the EEG, (b) in the activity of epileptogenic lesions and (c) in the patient's sedation, mainly in those patients who present emotional tension or anxiety, or who are non cooperatives. The authors found that the drug in this dosis does not have influence in the basic rhythm of the EEG nor in the activity of epileptogenic foci; as sedative, the drug has presented diverse results and they cannot yet be conclusive. Since the drug does not affect the basic record nor change the epileptic activity, it can be used as coadjuvant in the routine EEG of patients suspects of being epileptics.