Be careful with strong painkillers. Once you are addicted to codeine based drugs your mind and body can start to create more pain in order to get the drug. I know it may sound crazy but I know from first hand experience.
Now I get by with ibuprofen and a kick of caffeine to get it working a little faster.
I have asked several pain specialists, and a couple of general practitioners, about this "need creep" and this just is not true for the legitimate pain patient. There may be some sedation when first treating writhing pain with opioids, but once you reach the right therapeutic level, you can stay there for years without needing a higher dose.
Legitimate pain treatment requires tolerance, though. Tolerance means you can function normally while taking the medication. If you tolerate a medication well, it means that your body processes the chemicals efficiently with few or no side effects. The sedation, experienced in the early days, ends.
If the user is seeking a high, though, they will need more of the medication to get that same high. As soon as they develop tolerance, they no longer feel that high, because that high is a side effect.
When hearing tales of lives ruined and the other horror stories associated with pain control, be sure to consider the source and focus on your specific situation. If you must have effective pain control and the only efficient way to achieve it is through opioids, addiction is probably the least of your worries.
If you can get by on acetaminophen, aspirin, and milder pain medications, you do not need opioids and you are terribly lucky.
We all have similar diagnosis but different causes and different intensities. Each situation is different, requiring different approaches. Each should be honored and respected.