Hi im sorry if this should be elsewhere or if its previously been answered i cannot find a specific answer in the other related threads. Basically, i have been on methadone for several years now and no longer use illegal opiates. My methadone only last about 12 hours though and im finding im Jonesing through the night especially if i sleep during the day. I have read a lot about phenergan (promethazine) being used as a potentiator so i have ordered some from an online pharmacy...(56X10mg). I live in UK and the pharmacy has suspended delivery into several consignments ( I have yet to receive any), im guessing they must be aware of misuse if they are doing this. How many milligrams should i take on 56mls/mg methadone each day? Can anyone provide me information as to whether this has helped them and what the buzz is like and if it will make the methadone last longer than 12 hours? Appreciate any feedback thanks.