The drug inhibits P450 .
The drug enhances the effects of terfenadine , astemizole , indinavir , midazolam , calcium channel blockers , warfarin , cisapride and ciclosporin .
The drug inhibits P450 and enhances the effects of terfenadine , astemizole , indinavir , midazolam , calcium channel blockers , warfarin , cisapride and ciclosporin .