No. Not heroin. Although it often ends there, that's not where it starts.
Short version, US drug makers got sufficiently deregulated that they were allowed to say for themselves how bad their drugs were. So, of course, they lied. They came up with a series of synthetic alternatives to opium, called opioids, which they claimed were sufficiently different that they were not addictive.
Turns out they're about the most addictive substances known to man.
But since they were officially 'not addictive', and they were profitable as all hell, they are massively over-prescribed. Leading to a massive addiction problem to something which is effectively heroine in a pill form. Meaning much easier to transport and use. And it is as deadly as heroine. But since it comes in a pill, you can't even cut the dosage. So it is both addicting, and killing, a lot of people.
But, because the American medical establishment is racist, white people 'feel real pain, and so need real pain medication', while black people are just looking for a fix. So white people, particularly white working class people, and frequently that overlaps with white rural people, can get a prescription for an opioid far more easily than a black person can. As a result we have a drug epidemic which is hitting white people hardest. And therefor, is 'a problem requiring medical attention', rather than 'a bunch of scumbags that should be locked up'. Which is what happens when a drug epidemic is mainly non-white people.
So we have to DO SOMETHING!
So we're talking like overprescription of codeine, morphine, fentanyl, oxycodone, etc? Claiming those aren't addictive certainly seems like it should be straightforwardly criminal behaviour.