During the year 1976, 18 patients intoxicated with lomotil were admitted to the Emergency Service of the Centro Medico La Raza, I.M.S.S. with ages fluctuating between 4 months and 3 years; the average age was 22 mos. 88.8% of intoxications were accidental. Initial manifestations of atropinism and diphenoxylate showed the same proportion and 22% showed mixed symptoms. There were no deaths. All patients were given stomach washings and it was seen that the earlier the washing was given, the lesser the symptoms showed. The specific treatment given was with naloxone chloride (Narcanti) at a dose of 10 micrograms, per kilo and per dose intravenously and was repeated as often as necessary. Response was spectacular with improvement within 15 seconds. No patient showed side-effects to the application of the antagonist. Lomotil intoxication rated up to 15% of the total sum of intoxications admitted.