FIELD: medicine, pharmaceutics.
SUBSTANCE: method for preparing a composition for injections containing sodium cevtriaxone and sodium tazobactam involves the following stages: (a) suspension of raw materials, i.e. sodium cevtriaxone, sodium tazobactam, sterilised water for injections, mixed solution of ethyl acetate and isopropyl alcohol, and anhydrous ethanol in mass relation making 3-5:1:2:5:9, with volume relation of ethyl acetate to isopropyl alcohol making 1:2-4; (b) dissolution of sodium cevtriaxone and sodium tazobactam in sterilised water for injections with added activated hydrocarbon and filtration; (c) addition of the mixed solution of ethyl acetate and isopropyl alcohol to the filtrate and agitation of the mixture; addition of a seed crystal of sodium cevtriaxone to the solution for crystallisation initiation; and finally washing of the crystals in anhydrous ethanol and crystal drying; and (d) lyophilisation to form the composition for injections containing sodium cevtriaxone and sodium tazobactam.
EFFECT: composition is characterised by high uniformity, high degree of purity and safety of use.
6 cl, 2 tbl, 3 ex
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