History of the American Drug War The first act of America's anti-drug laws was in 1875. It outlawed the smoking of opium in opium dens. This was a San Francisco ordinance. The basis on passing this law was that Chinese men had a way of luring white women to their dens and causing their "ruin", which was the association with Chinese men. Later, other Federal laws such as trafficking in opium was illegal for anyone of Chinese origin. The opium laws were directed at the smoking of opium. The law didn't effect importation of the drug because opium was a common medical drug. This law was specifically targeted