NCIt definition : A stereoisomer of verapamil and third-generation P-glycoprotein inhibitor. Laniquidar
inhibits the drug efflux pump P-glycoprotein, resulting in higher concentrations of
antineoplastic agents in tumor cells that are multi-drug resistant due to the overexpression
of P-glycoprotein. (NCI04);
Alternative definition : NCI-GLOSS: A substance that is being studied for its ability to make cancer cells
respond to drugs to which they have become resistant. It belongs to the family of
drugs called multidrug resistance inhibitors.;