The government can’t regulate a black market.
Or, just keep doing what they're doing. It's bound to work eventually, right? Drug cartels are definitely growing less powerful every year, the war of drugs is being won, rate of addiction is going down.
Or perhaps selling it directly?
Has this ever worked? Do you have any evidence whatsoever that this is a good idea?
Western democracies haven’t really prioritized “war on drugs” (for lack of a better term) over the last probably 10ish years. Yeah there’s still funding and initiatives and some lip service.
Instead the focus has been largely infighting and major political factions fighting for political power in the next generation (“tech bros” political class for one)
So it’s no surprise state-sponsored (and just demand driven) drug trafficking into the US hasn’t received much action.
There is some hope though. With rare earth mineral access being a major national security priority, and many cartels controlling those areas in SA, the converging interests may produce some net positive. Background: https://youtu.be/q_n-74ifBZs?is=nw5g-mmPmKphGH2W
The Mafia keeping fentanyl out isn't a public service. It's a cartel protecting its own drug market, which says nothing about whether democratic states ( globally ) are failing their citizens.