I don't see a problem.  Double the money, to double the overdose.  The druggies will die happy, neighbors will live trouble-free, and tax-payers' long term burden will be less..  Only losers will be poverty traders, and drug dealers.
Still better, consult President Rodrigo Duterte of Philippines.  He is a very successful drug-buster.  As a bonus, he cleanse the society of the parasites, posing as social scientists.