Drug Gene Type Source Levorphanol tartrate CYP2D6 Text_Mining(affects(chemical synthesis)) CTD Levorphanol tartrate CYP2D6 Text_Mining(increases(chemical synthesis)) CTD Levorphanol tartrate CYP3A4 Text_Mining(affects(metabolic processing)) CTD Levorphanol tartrate CYP3A5 Text_Mining(affects(metabolic processing)) CTD