1925 CE
Panama Report concludes marijuana has no harmful effect on users

After growing concerns about the regular cannabis smoking among U.S. troops in the Panama Canal Zone, an investigation is launched and culminated in the publication of a report. The Panama Canal Zone Report concludes that "there is no evidence that marihuana, as grown and used [in the Canal Zone] is a 'habit-forming' drug in the sense in which the term is applied to alcohol, opium, cocaine, etc., or that it has any appreciably deleterious influence on the individuals using it." No action is recommended to be taken to prevent cannabis use or sale in the Zone.

Source: Austin, G. A. et al. (1979). Perspectives on the history of psychoactive substance use. NIDA.

Drugs: Cannabis (marijuana)
Regions: Central America, USA (United States of America)
Topics: Drugs and war