To underscore this, the reason we have a heroin epidemic is because our solution to the preceding prescription opioid epidemic was to take away the pills.
Yes [1].
Law-abiding Americans became addicted to prescription opioids (wave 1). We clamped down on their distribution, particularly prescription, and left those addicted with no legal choices. They turned to heroin (wave 2). So we clamped down on its distribution, particularly import, and so got concentrated (easier to ship) and synthetic (no unique precursors) fentanyl (wave 3).
Criminalization of drugs, but not of all substances is a must. Alcohol and marajuana are certainly okay. But again criminalization is the only way to ensure people get the attention they need. We just need to change the way we jail people.
In Thailand you get two options go to jail or go to a temple and get clean.