Drug Gene Type Source Hydroxyphenytoin UGT1A1 Text_Mining(decreases(activity)) CTD Hydroxyphenytoin UGT1A1 Text_Mining(increases(glucuronidation)) CTD Hydroxyphenytoin UGT1A4 Text_Mining(decreases(activity)) CTD Hydroxyphenytoin UGT1A4 Text_Mining(increases(glucuronidation)) CTD Hydroxyphenytoin UGT1A6 Text_Mining(decreases(activity)) CTD Hydroxyphenytoin UGT1A6 Text_Mining(increases(glucuronidation)) CTD Hydroxyphenytoin UGT1A9 Text_Mining(decreases(activity)) CTD Hydroxyphenytoin UGT1A9 Text_Mining(increases(glucuronidation)) CTD Hydroxyphenytoin UGT2B15 Text_Mining(increases(metabolic processing)) CTD