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[Drug therapy of sleep disorders in shift workers].

The hypnotic action of a soporific may be of limited use in populations who live in contradiction to their "internal biological clock". In order to test the assumption 60 nurses who had a disturbance in their sleep-waking rhythm due to shift work participated in an one-week double blind study. Nurses were randomly assigned to receive either lormetazepam 1 mg (Noctamid) or placebo (n = 30 per group). In the nurses with disturbance of falling asleep, a normalization of the duration of falling asleep occurred in 15 of 17 cases under lormetazepam as compared to ten of 17 under placebo. In the nurses who slept too little the length of the sleeping time normalized in 15 of 16 cases under lormetazepam as compared to the nine of 16 under placebo. With simultaneous consideration of the duration of falling asleep, total duration of sleep and depth of sleep, a distinction was made between "normalization in all three parameters", "normalization in one or two parameters, but no deterioration in any parameter" and "no normalization" for evaluation of the therapy comparison. The action of lormetazepam was shown in higher improvement rates (p less than 0,05). Neurophysiological and social medical implications are being discussed.