Hematological and hemostatic alterations induced by clofazimine and clarithromycin in rats / Alterações hematológicas e hemostáticas induzidas pela clofazimina e claritromicina em ratos




Clarithromycin and clofazimine have been used to treat leprosy and tuberculosis as well as infections of Mycobacterium avium complex, an ordinary complication in patients who are in advanced stage of Acquired Immunodeficiency Syndrome (AIDS). As the data about the toxicity of therapeutic schemes including those drugs are scarce, this research had the aim to determine the adverse effects of those therapies, through the evaluation of hematological, hemostatic and biochemical parameters and the relationship between these parameters and doses tested and between doses and plasma concentrations of drugs administered intraperitoneally, in male Wistar rats, in monotherapy, in single (50, 100 and 200mg/kg body wt), and multiple (100mg/kg body wt) doses regime. Clofazimine, in single dose regime, increased the number of erythrocytes, and it decreased the red cells indices MCV and MCHC. In multiple dose regime, clarithromycin increased the number of leukocytes and mononuclear and polymorphonuclear cells. Both the drugs, in single dose, seem to invert the proportion between mononuclear and polymorphonuclear cells. It was observed an increase in the number of polymorphonuclear cells and cells under degeneration caused by clofazimine and clarithromycin. In single dose regime, clofazimine and clarithromycin prolonged PT. When clarithromycin was administered in multiple dose, it brought about this same effect and also it prolonged aPTT. The results of hepatic function evaluation showed inconclusive results about AST, ALT and alkaline phosphatase levels, but it was observed an increase of U-GGT plasma levels provoked by clofazimine, in single dose regime. Clarithromycin brought about an increase of U-GGT plasma levels, in single and multiple dose regime, and caused an increase of total and direct bilirrubin, in single dose. An increase of plasma concentration of drugs was observed as administered doses were increased, though clarithromycin has nonlinear pharmacokinetics behavior. Therefore, clofazimine and clarithromycin induce hematological, hemostatic and biochemical alterations and the results of plasmatic concentration are valuable to evaluate adverse effects in comparative research of monotherapy and association between drugs.


clarithromycin clofazimine alterações hematológicas clofazimina hematological alterations claritromicina

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