Our expert says:
In fact one can become allergic to something one has had no problemn with for years. medication for your Depression, ADD and OCd sounds reasonable - they do often need to be taken long-term. But I'm worried that you have been taking Codeine for so long - if one has such chronic pain, its important to find the cause and change that - codeine, remember, is related to morphone and can be addictive as well as causing problems like constipation and it might be hard to come off it, but worthwhile doing - I hope you have discussed this with the shrink helping with your other problems.
YOu don't mention what sort of new reaction to the codeine you have noticed, so I can't comment as to whether this might be allergic or whatever else.
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