JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
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Intravenous ilaprazole is more potent than oral ilaprazole against gastric lesions in rats.

BACKGROUND AND AIMS: Ilaprazole is a novel proton pump inhibitor that has been marketed as an oral therapy for acid-related diseases in China and Korea. This study aimed to compare the gastroprotective effects of intravenous and enteral ilaprazole in rat models.

METHODS: The rats were divided into 7-8 groups receiving vehicle, esomeprazole, and different doses of intravenous and enteral ilaprazole. The rats were then exposed to indomethacin (30 mg/kg, i.g.), or water-immersion stress and gastric lesions were examined. The effects of different treatments on histamine (10 μmol/kg/h)-induced acid secretion were also observed.

RESULTS: Intravenous ilaprazole exhibited high antiulcer activity in a dose-dependent manner. Ilaprazole at a dose of 3 mg/kg decreased ulcer number and index to the same extent as 20 mg/kg esomeprazole. Moreover, the potency of intravenous ilaprazole is superior to that of intragastric ilaprazole. In anesthetized rats, the inhibitory effect of intravenous ilaprazole on histamine-induced acid secretion is faster and longer-lasting than that of intraduodenal ilaprazole.

CONCLUSION: Intravenous ilaprazole is more potent than oral ilaprazole against indomethacin- or stress-induced gastric lesions, with faster and longer inhibition of acid secretion.

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