The pill problem in the US is a result of blatantly dangerous marketing of narcotics by pharmaceutical companies like Purdue, which blatantly marketed OxyContin as if it was a Pepsi product or a headache medication, giving all-expense trips to doctors for seminars in luxurious resorts where they touted its non-addictive nature and its wide applicability. It's sales agents pushed it on physicians they felt were likely to prescribe it, and distributed promotional items like the CD below.
There was a big push for pain management in the early 2000's and congress declared 2001-2010 the Decade of Pain Control and Research, ironically it would also become the decade of a renewed opiate crisis in many parts of the United States as a direct result of this push.
In Florida, pain clinics opened up that accepted walk-in patients from out of state, driven almost purely by greed on the part of "doctors" that saw the potential for quick cash and became legal drug pushers. Florida physicians at one point were responsible for writing the prescriptions for a full 80% of the oxycodone prescriptions across the United States.
Drug dealers saw the potential, and came to Florida with hundreds of thousands of dollars at a time, given to people who coordinated a network of "pain patients" who eould visit multiple doctors and multiple pharmacies and the end result would be dealers returning home to Appalachia, New England, and virtually everywhere else with thousands of pills which were sold on the street like street drugs.
As regulatory agencies finally cracked down on overprescribing and Florida pain clinics, the price of pills increased until it was no longer viable to sustain a habit, and then areas like Appalachia and New England saw massive increases in heroin use, as indicated by overdose deaths and detox admittance information.
It's another result of the power of corporate greed to influence medicine and politics in the United States. The lobbying power of the pharmaceutical industry (among others) can not be underestimated here.