The opioid crisis isn't related to the war on drugs. It was caused by doctors being misinformed about how prescription opioids worked by the drug manufacturers + widely disseminated (funded) research about pain treatment. This caused people to be prescribed opioids without a risk assessment for addiction or similar, and thereby lots of people got addicted after being prescribed for broken bones, surgeries, and general discomforts.

When you hear about X overdoses in an area in a shockingly small amount of time, it's not people dying because they took too many oxycodone pills, it's because of street fentanyl. You can thank the war on drugs for that.