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The pharmacokinetics of mangiferin (the main component of the drug 'Alpizarin') was studied by HPLC in rats after intravenous injection of the drug in a single dose of 0.3, 1, 3, 10 and 30mg/kg and after its oral administration in a single dose of 50-500 mg/kg. It was shown that the mangiferin pharmacokinetics for the above dose levels was nonlinear, and within each dose could be described by a two-compartmental model. Its nonlinearity might be associated with saturated binding and metabolism of the compound.