I am really absolutely sure DXM potentiates opiates by way of It is dissociative exercise but not completely positive it doesn't have to complete with liver enzymes. Assuming dissociative effects of DXM cause potentiation it makes perception that ketamine would get it done as well. I'll try uncover something definitive https://zopedirectory.com/listings733403/not-known-facts-about-codeine-toux