This study investigates the effects of chronic use of benzodiazepines (BZ) as hypnotics on the neuropsychological performance of older adults with insomnia. Twenty-one older persons who had used BZ on a chronic basis (average duration = 21.7 years) for their sleep difficulties were enrolled in a medication withdrawal program. A neuropsychological evaluation was conducted before and after the taper program. A control group composed of older adults not using BZs and without sleep complaints were also evaluated for comparative purpose. The results showed that prolonged use of BZ produces mild and selective impairments of cognitive and psychomotor performance. However, BZ users subjectively evaluated their own performance much more negatively than good sleepers. The results are discussed in terms of a possible amplification of performance deficits among insomnia patients and also as a tolerance to adverse effects that develops with prolonged utilization of BZ.
