Eh it does not even matter whether or not it is scripted in terms of a problematic addiction. I am not even speaking of the opiate dependency that is being developed, but just the problem of how much it takes out of your life to fulfill the habit. Not even just the money and time it takes making it, but also the time & energy it takes preparing it. Also the way it impacts how you feel about yourself having to do it.
This is coming from someone who is struggling to work with pain management to work on injuries neglected from childhood I struggle with now so that in the end I can get off daily opiate use and even daily heavy cannabis use. I have had experience with minor recreational and even self medicating use and honestly believe it is not worth it at all without working with everyone in your life, including doctor, to figure out the best medication and making sure you have enough during the management treatment as well as as keep an eye on your dosage to make sure it stays steady rather than raises.
I am curious do you smoke cannabis? While being another "drug" that may be hard to get, as well as may be another dependency that you can develop, although it is known to potentate opiates. Personally I find it is very helpful in sustaining the proper effect with a lower dosage, but I am also a medical patient with easy access to quality bud & concentrates if my funding allows.
Honestly I am just recommending weening your dose down so it is effective again in lower doses if you really need to use it. Also to help figure out a better recreational choice (not opiate) if this is the reason of use.
If you are using it for pain management I recommend trying to discuss a morphine based compound at night and use the codine compound in the day if needed. Remember you are not trying to get the strongest effect with the lowest dose but an effect that is acceptable at the lowest dose until you can get that effect with a lower dose than you started. I find this practice and mindset works best for me. Hydromorphone has best BA orally and would recommend this first. I would recommend oxymorphone as I find it causes the most analgia & sedation, but it has such a low BA orally and shoots tolerance up very fast, as well as hydromorphone. Some people do well with morphine, but it has such a varying effect in my opinion it will end up with you taking extreeme doses as well.