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Comparative study of prednisolone alone and prednisolone plus fusidic acid in the treatment of children with steroid-responsive nephrotic syndrome.

BACKGROUND
There are several reports in the literature indicating that fusidic acid owns functions similar to those of cyclosporin. As cyclosporin has effectively been used in frequently relapsing steroid-responsive nephrotic syndrome we carried out this study to determine whether fusidic acid used along with prednisolone diminishes rate of steroid-responsive nephrotic syndrome relapses in children.


PATIENTS AND METHODS
The patients were randomly allocated to receive either prednisolone alone or prednisolone plus fusidic acid for two months in standard doses. In the cases of relapses the treatment was changed to the comparative treatment method. Altogether 18 children (12 boys and 6 girls) aged 1.3 to 13.2 years entered the study. Thirteen of them were treated by either method on different occasions, four patients were treated with prednisolone only, and one child was treated with prednisolone plus fusidic acid only. Thus, there were 17 evaluable treatment courses with prednisolone alone and 14 courses with prednisolone plus fusidic acid. The patients were followed-up as long as the remission lasted.


RESULTS
There was prompt and complete response under the influence of both treatment methods. However, relapses occurred in all the patients irrespective of the mode of treatment. Mean duration of remissions did not differ significantly between the study groups (17.8+/-20.4 weeks in the prednisolone group and 18.3+/-23.9 weeks in the prednisolone plus fusidic acid group; p>0.05). There were no statistically significant differences in laboratory parameters reflecting therapeutic efficacy in the comparative treatment groups, too.


CONCLUSION
Thus, it was not revealed any remission-sustaining efficacy of fusidic acid used in standard doses for two months along with prednisolone in children with frequently relapsing steroid-responsive nephrotic syndrome.