Federal revenuers have designated six associates and several companies allegedly tied to Mexican drug cartel Los Gueros under the U.S. Kingpin Act which prohibits American citizens from doing business with them as reported by UPI:
"Today's designation of Los Gueros' business network follows the arrest and extradition to the United States of two of its leaders. This action will further damage Los Gueros' business empire and impede its ability to reap benefits from the drug trade," said Treasury's Director of the Office of Foreign Assets Control Adam J. Szubin.
Now why doesn't the Treasury Department take similar action against American-based Mafia families which are engaged in the international drug trade?
Further reading that may be of interest: