Dear Sir
I read with interest the article by Gafni et al(1) regarding the
influence of tenofovir on bone mineral density in children. The authors
stated that the children were not treated long term with medications that
might affect bone and that the corticosteroids used were unlikely to have
been the primary cause of the observed bone loss. However, some children
were taking ritonavir and fluticasone and there is no information as to
length of concurrent treatment. Ritonavir can increase the concentration
of fluticasone such that systemic effects have been observed(2,3,4) and I
wondered what influence this may have had on these children’s results.
Yours sincerely
Anne Sutcliffe BSc, BPharm
Editor
Australian Medicines Handbook
Adelaide, South Australia
1. Gafni RI et al. Pediatrics 2006;118:e711–718.
2. Gupta SK and Dube MP. Exogenous Cushing syndrome mimicking human
immunodeficiency virus lipodystrophy. Clin Inf Dis 2002;35:e69–e71.
3. Clevenbergh P et al. Iatrogenic Cushing’s syndrome in an HIV-
infected patient treated with inhaled corticosteroids (fluticasone
propionate) and low dose ritonavir enhanced PI containing regimen. J
Infect 2002;44:194–195.
4. Arrington-Sanders R, Hutton N and Siberry GK. Ritonavir-
fluticasone interaction causing Cushing syndrome in HIV-infected children
and adolescents. Pediatr Infect Dis J 2006;25:1044–1048.
Conflict of Interest:
None declared