Hi DCot,
I think the best way to quit is to do so very slowly, especially if you have been taking Solpdadeine for a long time. Different people suffer from different withdrawal symptoms. For me, they take the form of terrible headaches and migraines. I sometimes get lower back pain, too. Other people get different symptoms, like restless legs at night.
You could try cutting down by a quarter of a tablet a day (or even a little less) and taking your Solpadeine doses at regular times (e.g. 9AM, 1PM, 5PM, 9PM) to keep caffeine and codeine levels relatively stable in the blood. Sudden dips in these levels can trigger nasty withdrawal headaches or migraines.
It helps to drink lots of plain, cool fluids, too, like still water (not fizzy, as it makes headaches much worse, for some reason). Coconut water (much cheaper in Lidl than in other shops) is also very hydrating.
Eating regular meals helps keep blood sugar levels stable so that you don't get ravenously hungry or trigger a headache due to lack of food. I find some foods help during withdrawal, like brown rice and steamed courgettes / zucchini. Other foods and drinks (e.g. more complicated recipes, meat, chicken stock, milk, sweet things, yeast/sourdough bread, tea, coffee, alcohol, etc.) make things a lot worse for me during withdrawal.
If you withdraw slowly, you should avoid the lion's share of detox issues. I hope you do, anyway.
All the best,
Storm
