Polarographic investigation of the metronidazole complex with polyvinylpyrrolidone*

Polarographic behavior of the metronidazole complex with polyvinylpyrrolidone in Britton-Robinson buffer solutions have been studied. This complex possesses prolonged antimicrobial action. Complexation with polyvinylpyrrolidone was shown to alter the mechanism of metronidazole reduction and increases its solubility in water. The temperature dependence of the limiting currents indicates the formation of additional hydrogen bonds in the complex, which restricts diffusion of the depolarizer to the cathode.