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Pharmacokinetic interaction between ϵ-acetamidocaproic acid (AACA) and cimetidine in indomethacin-induced acute gastric ulcer and control rats: inhibition of active renal secretion of AACA by cimetidine.

Xenobiotica; the fate of foreign compounds in biological systems (2011-01-22)
Y H Choi, U Lee, J H Suh, Y G Kim, M Lee, E Oh, M G Lee
ABSTRACT

After both the intravenous and oral administration of zinc acexamate [ZAC; ion-pairing between zinc and ϵ-acetamidocaproic acid (AACA)] and cimetidine together, the areas under the curve (AUCs) of AACA were significantly greater [by 28.2 and 98.9% after the intravenous and oral administration, respectively, for control rats and 13.5 and 16.9% for indomethacin-induced acute gastric ulcer (IAGU) rats, respectively] than those of ZAC alone due to the significantly slower renal clearance (CL(R)). The significantly greater AUCs of AACA after both the intravenous and oral administration of ZAC and cimetidine together in control and IAGU rats could have been due to the inhibition of active renal tubular secretion of AACA by cimetidine. After the intravenous and oral administration of both drugs together, the AUCs of cimetidine in control and IAGU rats were not different compared with those with cimetidine alone.