ETRAVIRINE IS AN INDUCER OF CYP3A AND INHIBITOR OF CYP2C9, CYP2C19 AND P-GLYCOPROTEIN. THEREFORE, COADMINISTRATION OF DRUGS THAT ARE SUBSTRATES OF CYP3A, CYP2C9 AND CYP2C19 OR ARE TRANSPORTED BY P-GLYCOPROTEIN WITH INTELENCE® MAY ALTER THE THERAPEUTIC EFFECT OR ADVERSE REACTION PROFILE OF THE CO-ADMINISTERED DRUG(S).