- Patients should not receive concurrent therapy with known CYP3A4 substrates while on study and for at least 1 week following the last dose of BMS-214662; this is due to the CYP3A4 inhibitory potential of BMS-214662; a representative list of commonly prescribed known CYP3A4 substrates includes: terfenadine, astemizole, triazolam, midazolam, cisapride, bepridil, rifabutin, simvastatin, lovastatin, and propafenone