Abstract
Hyperuricemia has been reported as being an adverse effect of pegylated-interferon-alpha2b (Peg-IFNalpha2b) and ribavirin combination therapy for chronic hepatitis C and hyperuricemic changes occur in some patients during the therapy. However, detailed investigation of the elevation of uric acid has not been carried out previously. The incidence and mechanism of hyperuricemia were investigated in this study. The data of 50 patients with chronic hepatitis C who had been treated with Peg-IFNalpha2b and ribavirin combination therapy or pegylated-interferon-alpha2a monotherapy for more than 24 weeks were analyzed. The effects of these treatments were evaluated clinically by the serum uric acid level and its urinary excretion rates. In patients with pegylated-interferon-alpha2a monotherapy, no significant elevation was shown either in serum uric acid concentrations or excretion rates. On the other hand, serum uric acid concentrations were significantly elevated during the combination therapy, reaching > or =7.0 mg/L in men and > or =6.5 mg/L in women in 15% of patients. The urinary uric acid excretion rate was also elevated significantly. Peg-IFNalpha2b plus ribavirin combination therapy induced an elevation of uric acid concentration, although the elevated levels were still within normal limit in many cases. It may be that ribavirin plays a leading role in its elevation and other factors may also be involved.
Published Version
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