In a sample of 78 female alcohol and drug addicts, 24.4% marked True the Item 31 ("I have nightmares every few nights") of the MMPI. The proportion is significantly higher than in normative MMPI data of normal US Midwest women published by Coligan: only 8.2% of the latter marked the item True. The female alcohol and drug addicts who marked the item True differed from those responding with False by higher scores on Schizophrenia, Psychasthenia, Paranoia, Anxiety, Depression, Psychopathic Deviate, and Social Introversion scales and by lower scores on Ego Strength scale. Nightmare sufferers consistently scored in a more pathological direction.