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#1 The price will drop to the floor.

#2 Most drugs can just as easily be produced domestically by pharmaceutical companies.

#3 Of the drugs that can't be produced domestically, the Mexican cartels are just middlemen that can be cut out entirely. There's no reason drugs from Colombia need to transit Mexico.

#4 If you're worried about Colombian cartels - see points #1 and #2.

We already went through this with alcohol and organized crime.