Grapefruit Juice (GFJ)- I had toyed with the concept of working with grapefruit juice for many years but have browse blended reports. Just lately I read through that it isn't going to inhibit CYP2D6 but rahter 3A4 which can be answerable for conversion of codeine into norcodeine. In principle by inhibiting 3A4 you allow much more codeine for 2D6 to