Encequidar

**Semantic type:** Pharmacologic Substance

**Definition:** An inhibitor of the adenosine triphosphate (ATP)-binding cassette (ABC) transporter P-glycoprotein (P-gp), with adjuvant activity. Upon oral administration, encequidar selectively binds to and inhibits the multidrug resistance (MDR) efflux pump P-gp, which prevents the efflux of various chemotherapeutic agents from intestinal epithelial cells to the gastrointestinal tract. This leads to an increase in both oral bioavailability and therapeutic efficacy. P-gp prevents the intestinal uptake and intracellular accumulation of various cytotoxic agents. Encequidar is not systemically absorbed.

**Synonyms:** - 4-Oxo-4H-chromene-2-carboxylic acid [2-(2-4-[2-(6,7-dimethoxy-3,4-dihydro-1H-isoquinolin-2-yl)-ethyl]-phenyl-2H-tetrazol-5-yl)-4,5-dimethoxy-phenyl]-amide - ENCEQUIDAR - HM30181AK - Pgp Inhibitor HM30181AK