[Preventive action of an immunomodulator on respiratory infections in elderly subjects]

Three hundred and fourteen elderly subjects admitted to chronic medical centers were given either RU 41740 (n = 155) or a placebo (n = 159) at the rate of one course per month during three months. RU 41740 was administered in doses of 2 mg per day during 8 days in the first course and 1 mg per day during 8 days in the second and third courses. The subjects were followed up and regularly examined every three months for one year. The incidence of acute infectious episodes was evaluated in both groups. Compared to those patients who received the placebo, the number of subjects without infection was significantly higher in the treated group during the 0-6 months and the 0-9 months periods and during the 12 months of observation. The number of infectious episodes was reduced during the 0-3 months and 0-9 months periods and throughout the 12 months of the trial. The mean duration of pulmonary infections that occurred during the 0-6 and 0-9 months periods was reduced. Finally, there was a significant decrease in the duration of antibiotic therapy during the 0-3, 0-6, 0-9 months periods and during the 12 months of observation. The drug was well tolerated. This study showed that RU 41740 is effective in protecting elderly and therefore fragile subjects against respiratory infections.