700-1300 mg
I am a 23 year old Australian guy and I frequently use Rikodeine (dihydrocodeine tartrate) in a liquid suspension. It doesn't have any paracetamol or anything like that in it, just the good stuff. Which you buy from a pharmacy very easily over here. I have become very dependant on it and use it every day. I have broken the habit a few times before, once after a very long period of use. The withdrawal was like fire ants crawling in my intestines and out my eyes, it was like having a severe flu and being par-boiled in hot oil with a head full of ice blocks. The depression after the withdrawal lasted a month and for the first few days I couldn't get out of bed. Yet I still use it everyday now and I am to scared to stop it and go through that again.
I just find the euphoria is just what I need, it gets me through the day, it feeds my body like a line of speed and it lasts for hours. I know what I do is dangerous but I can't stop and the quantities I take are probably doing horrible things to my body.
I guess I'll just have to see what happens.