Sophie28,
Its difficult to predict because codeine has a long half life in the body. You can feel fine one day and really terrible the next. I drop 60-30mg a day. Then 15mg when I am in the low dose range. That I can endure.
I have had a terribly dangerous habit – taking vast quantities and now codeine gives me no pleasure, only nausea. But I still feel compelled to take it. How strange life is.
The worst days I deal with by keeping warm, making sure I have comforting, small meals and try to get some exercise in. The exercise seems to break the cycle of fear and depression that are the worst aspects of withdrawal. I am sometimes sick if I withdraw too fast – I try to avoid this to maintain normal function (I still need to work and do domestic stuff). I generally try to keep busy too.
If you are taking Nurofen plus or anything else with paracetamol or ibuprofen understand these tablets will kill you. slowly and horribly. Please try to get off them and stay off them. My grandad died of a stomach bleed caused by ibuprofen. If you are taking a lot of tablets a day – at least consider cold water extraction or GP consultation to get something that can help you.