ENHANCEMENT OF SOLUBILITY OF POORLY WATER SOLUBLE DRUG – METRONIDAZOLE BY HYDROTROPY
Keywords:
Metronidazole, Urea, Hydrotropy, DissolutionAbstract
Metronidazole is an oral synthetic antiprotozoal and antibacterial agent, 2-methyl-5nitroimidazole-1-ethanol (C6H9N3O3 ). It is physically available in white to pale yellow crystals or crystalline powder with 159-1630C melting point. It is sparingly soluble in Water and in Alcohol; slightly soluble in ether and chloroform. In the present investigation different concentrated solutions of urea (a hydrotropic agent) were employed to enhance the aqueous solubility of Metronidazole which is a poorly water-soluble drug. Here hydrotropic phenomenon i.e solvent evaporation technique and melting method were employed to prepare solid dispersions of Metronidazole. Solid dispersions were evaluated for dissolution rate and a marked increase in dissolution rate was observed. Marked increase in Metronidazole release during drug dissolution profile was found with its solid dispersions as it is poorly water soluble drug. As a hydrotropic agent Urea was used to prepare solid dispersion so that the solubility of Metronidazole could be increased.
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