[Acyclovir in the treatment of varicella in immunocompetent children]

We evaluated safety and tolerance of acyclovir ACV per os in immunocompetent children affected by chicken-pox admitted to our department from January 1993 to December 1994. 183 subjects (102 males and 81 females) aged between 0 and 14 years were treated by ACV (80 mg/kg/daily in 4 divided doses): 88 children were treated within 24 hours and 95 subjects within 48 hours from the onset of symptoms. The control group consisted of 83 children (52 males and 31 females) aged between 0 to 14 years. In all patients routine blood-test were performed and in those with respiratory illness Chest-Rx was also done. We evaluated clinical course, degree of eruption, the appearance and kind of complications, duration of hospitalization, the compliance and the potential consequences on specific antibody response. Our results show a faster improvement of clinical symptoms in treated patients with respect to the control group with shortening of the period of the fever, itch and appearance of new vescicles. The percentage of complications was lower in treated than in untreated patients. 16 cases tested for specific antibody response showed protective titers six months after treatment. In conclusion, ACV administered per os within 48 hours from onset of exanthema causes reduction of the period and the degree of general symptoms and exanthema, a lower incidence of complications even if non statistically significant. The drug is safe and well-tolerated.