Abstract
To compare pharmacokinetic behaviors of nitrendipine submicron emulsion with nitrendipine solution following intravenous administration in rats. The plasma concentrations were analyzed by ultra-performance liquid chromatography coupled with tandem mass spectrometry detection (UPLC–MS/MS) through a new validated method. The pharmacokinetic parameters of the nitrendipine submicron emulsion and nitrendipine solution were as follows: AUC0–t 900.76 ± 186.59 versus 687.08 ± 66.24 ng h/ml, Cmax 854.54 ± 159.48 versus 610.59 ± 235.99 ng/ml, t1/2 2.37 ± 1.99 versus 2.80 ± 2.69 h. The relative bioavailability of nitrendipine submicron emulsion to nitrendipine solution was 131.4 ± 11.3%. The developed methods could meet the requirements of bioanalysis. Compared to the solution injection, intravenous submicron emulsion presents higher systematic exposure which can help to improve the therapeutic efficacy.
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