Grapefruit Juice (GFJ)- I'd toyed with the idea of utilizing grapefruit juice for many years but have examine blended experiences. Just lately I browse that it would not inhibit CYP2D6 but rahter 3A4 which is accountable for conversion of codeine into norcodeine. In theory by inhibiting 3A4 you allow extra codeine for 2D6 to turn into morphine. Imm