There are many people who never took recreational drugs yet found themselves in grips of an addiction to opiods. Every year, millions of people are injured or have a a medical condition which calls for a prescription of opiates to deal with the pain. The pain may or may not go away and an addiction can innocently begin.
Many addicts start out as patients with legitimate medical problems and they have to that narcotics to deal with the pain. It may be an injury or a surgery that take weeks or months to resolve, and before they know it, their body is now addicted to the prescription medications which can essentially be medically produced versions of opium.
At some point the patient finds that the normal dose is no longer working or they slowly build a tolerance and begin taking more medication. Often the patient will start out with a short term pain issue such as a broken bone, or a medically necessary surgery. After a month or two, the doctor will expect that the patient will no longer need pain medication as the wound, injury or surgical site heals.
But the patient finds that they are feeling worse than before and may be ashamed to discover that only narcotics will quell the pain and misery that they are dealing with. They may insist that the initial problem is not healed or insist there is a new problem but one way or the other, they have to get those prescription narcotics. They will suffer without them.
They now find that a dose that may have previously boosted their mood does nothing but get them to feeling normal. Perhaps they rationalize that they are not an addict since they do not get “high”, they just need the opioids to feel “normal. They may not realize it yet but they are now an addict.