1.14.14.73 medicine enzyme is able to modify antihistamine drugs such as albendazole, amiodarone, astemizole, thioridazine, mesoridazine, and danazol with in vitro intrinsic clearance values ranging from 0.06 to 3.98 microl/min/pmol CYP2J2. Whereas isoform CYP3A4 commonly metabolizes compounds at multiple sites, CYP2J2 metabolism is more restrictive and limited, in general, to a single site for large compounds 744770