https://en.wikipedia.org/wiki/Equianalgesic
But it's already hopelessly outdated. A recent world survey determined that there are now at least 200 *new* mostly Fentanyl analogs, most of which are significantly stronger than Fentanyl.
While the vast majority are killing illegal drug users, an increasing number of people are dying from copycat drugs. Typically they think they are getting something like Oxycodone for their raging addiction, but instead it is Fentanyl, and they drop dead.
Remember that even Rush Limbaugh got hooked and had to go to rehab to get off the stuff. It's not just street junkies, but middle and upper class people who get ensnared by their physician. They take a legal drug for a major pain problem, and before they know it, they are hooked. The their doctor cuts off their legal supply, since he has no choice.
And since they are desperate, they buy counterfeits and bang, they are a statistic. Counterfeit Oxycodone:
My doctor’s office has a placard saying this:
Food is the most overused anti-anxiety substance,
exercise is the least.
My daily exercise routine in Gym is the type of “High” I prefer.