Abstract
Abstract Introduction. To determine the effect of initial therapy with Paracetamol and Ketoprofen on glomerular and tubular integrity in rheumatoid arthritis (RA), to quantify nephrotoxicity of these two drugs by measurement of enzymuria, which correlates with the damage of tubular epithelium. Microalbuminuria is used as a marker for glomerular damage, and urine excretion of N-Acetyl-b-D-glucosaminidase (NAG) as an indicator of proximal tubular damage. Methods. Using colorimetric method for determination of NAG, and immunoturbidimetric method for microalbuminuria, samples of 70 participants were examined (35 RA patients treated with Paracetamol only, 35 RA patients treated with Ketoprofen). The follow-up was in 5 time-intervals in the course of 24 weeks. Results. There was a moderate correlation between NAG and microalbuminuria (r=0.16) in the group of patients treated with Paracetamol only, and a moderate correlation (r=0.28) in the group of patients treated with Ketoprofen. NAG enzymuria in size, by number of patients Registered, and time of appearance, was greater and appeared earlier in the Ketoprofen group compared to the Paracetamol group. Conclusions. Ketoprofen is more potent NAG inductor and provokes greater tubular enzymuria than Paracetamol. Results from our study confirm safety in use of Paracetamol and Ketoprofen in everyday clinical practice.
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