Probably steroids and whatever replaced cocaine as the party drug of choice.
20 YO lots of free cash......??
Well it sure wasn’t lidocaine.
I think Meth and Fentanyl are only popular because the war on Cocaine and Heroin made them extremely expensive and difficult to smuggle. Easier and cheaper to just make chemically synthesized drugs in a barrel in a detached garage or RV in the desert. Both are much more addictive, much more deadly, and much cheaper to make but their rise is the direct consequence of the drug war.
Or just maybe a heart failure of natural causes........I prefer not to jump over the cliff of conclusions........