Author(s): Esteban MJ, Cantn E, Rius F
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Abstract The stability of ceftriaxone in undiluted human serum and in human serum diluted 1/20 in 0.1 M phosphate buffer (pH 6.0) was measured at -70, -40, -20, 4, and 37 degrees C. Ceftriaxone in diluted human serum contained at least 90\% of the initial activity after 3 months of storage at -20, -40, and -70 degrees C; unbuffered human serum contained 82.41, 84.92, and 88.96\% of the initial activity, respectively. Ceftriaxone in unbuffered human serum and in diluted human serum showed 80.33 and 86.25\% of the initial activity, respectively, after 55 days at 4 degrees C. After 120 h at 37 degrees C, this antibiotic in unbuffered human serum contained 33.08\% of the initial activity, whereas samples of diluted human serum contained more than 60\%. Consequently, the stability of antibiotic in human serum diluted 1/20 in 0.1 M phosphate buffer (pH 6.0) is increased.
This article was published in Antimicrob Agents Chemother
and referenced in Pharmaceutica Analytica Acta