Title : Evaluation of omeprazole and lansoprazole as inhibitors of cytochrome P450 isoforms.

Pub. Date : 1997 Jul

PMID : 9224780






1 Functional Relationships(s)
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1 Both drugs were competitive inhibitors of CYP2C9-catalyzed conversion of tolbutamide to 4-hydroxytolbutamide (K(i) = 40.1 +/- 14.8 microM for omeprazole, K(i) = 52.1 +/- 1.4 microM for lansoprazole) and were noncompetitive inhibitors of CYP3A-catalyzed conversion of dextromethorphan to 3-methoxymorphinan (K(i) = 84.4 +/- 4.0 microM for omeprazole, K(i) = 170.4 +/- 7.1 microM for lansoprazole). Tolbutamide cytochrome P450 family 2 subfamily C member 9 Homo sapiens