Grapefruit Juice (GFJ)- I'd toyed with the idea of employing grapefruit juice for some time but have examine blended experiences. Just lately I browse that it will not inhibit CYP2D6 but rahter 3A4 which is answerable for conversion of codeine into norcodeine. In principle by inhibiting 3A4 you leave a lot more codeine for 2D6 to grow to be morphin