<p>Both CYP1A2 and CYP2D6 isozymes are responsible for Duloxetine metabolism. When Duloxetine was co-administered with fluvoxamine, a potent CYP1A2 inhibitor, the AUC, Cmax and t of Duloxetine was increased. Other drugs that inhibit CYP1A2 metabolism include cimetidine and quinolone antimicrobials such as ciprofloxacin and enoxacin would be expected to have similar effects and these combinations should be avoided. Because CYP2D6 is involved in Duloxetine metabolism, concomitant use of Duloxetine with potent inhibitors of CYP2D6 may result in higher concentrations of Duloxetine.</p>