DRYING OF THE NEW WATER-SOLUBLE POLYMER COMPLEX OF ALBENDAZOL WITH PECTIN
UDC 547.587.11
Abstract
The drying process of the aqueous solution of the complex of Albendazole with pectin (Alpec) in a vacuum oven and by spray drying was studied. It was found that the drying in a nozzle-type spray dryer is preferable in yield and subsequent solubility of the final product. As a result of the studying of the parameters affecting to the drying process, the optimal mode of the dryer was established, which provides the high yield of the dry product: the temperature of the coolant at the inlet is 130–140 °С, the output is 60–70 °С, the solution flow rate is 2.5 l/h·min. The yield of the dry product is 85%.
The comparative IR spectra of Alpec powder after spray drying, after drying in air, the starting Albendazole and pectin unambiguously indicate that the structure of the complex of Albendazole with pectin (Alpec) is identical after different types of drying.
The biological activity of Alpec dry substance after spray drying compared with Albendazole was studied. The increased biological activity of Alpec compared with Albendazole was established, which can, probably, be explained by the good water solubility of Alpec in contrast to Albendazole and, as a consequence, the increase of bioavailability of the drug. It was found that the average lethal dose of Alpec (LD50) is 680 (601.8–768.4) mg·kg-1 (LD50 Albendazole - 400.2–450.4 mg·kg-1), i.e. the drug "Alpec" in terms of acute toxicity during intragastric use is classified as moderately hazardous substances.
On the base of the results obtained, the technology of the obtaining of the anthelmintic drug alpec substance in the form of a water-soluble dry powder has been developed.
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