[tmp-20150107]

Sounds about right. As a heroin addict, I have seen people who are completely clean relapse after maybe three days of taking it daily again, and I have even noticed signs of withdrawal in people who have only taken the drug a couple of times, but on consecutive days. In general, it is the repeated consumption without giving your body time to return to its baseline state (which can take up to three days, depending on the drug and its half-life) that causes the physical addiction - all the scare stories about 'one hit and you're addicted' are just that; stories.

For anyone needing opiates as pain medication, I would suggest taking them only in response to acute pain, not as a regular dose, although this may not be possible for chronic sufferers. It's a difficult situation, the best painkillers are horribly addictive and socially stigmatized.