Members of the inner circle of President Enrique Peña Nieto and of the safety and social security cabinets said that a bill will be taken to Congress before the end of the year.
An alarming 47,000 American overdose deaths in 2014 has pushed elected leaders to consider government-sanctioned sites where users can shoot up under the supervision of a doctor or nurse who can administer an antidote if necessary.
The man is linked to the Guerrero Unidos Mexican cartel and has pleaded guilty to federal drug charges.
The group recommended to conduct a comprehensive investigation, fully identify the fifth bus taken by the students and change the narrative of the case.
A heroin epidemic has killed tens of thousands of people in the United States in recent years and led to a surge in demand for Mexican heroin.
He said that declaring unconstitutional to prevent people from smoking marijuana would eventually lead to a similar decision for cocaine and heroin.
Jonathan Elias, 18, and Brayan Valle, 19, admitted in federal court that they drove to a field in Calexico, California, in April to pick up a bag with 28.6 pounds of heroin that was sent across the border by drone.