[Chronotherapy of obesity. II. Variations in eating behavior in the obese after fenfluramine treatment in relation to time of administration].

The administration of Fenfluramine (F.) in a single dose in the morning provokes a different effect on eating behavior (E.B.) in comparison with the administration of the same dose three times/day. It is observed a shorter duration of eating (p less than 001); a decrease of total kcalories ingested during the day, and hunger feeling. These results are reviewed on the basis of present knowledge on drug-kinetic and on previous work in our laboratory which documented higher decrease of body weight and adipose mass when the F. was administered in a single dose in the morning than in the afternoon or three times a day.