From the Document: "The U.S. has a long history of drug abuse. Legally, the United States imported opium for more than a hundred years. Morphine was in common use during the Civil War. Heroin was manufactured by the end of the nineteenth century. And cocaine, long a popular tonic, was marketed as a cure for narcotic addiction. By the beginning of this century there was a steadily strengthening sentiment for outlawing alcohol but little public concern for the widespread use of narcotics. They were plentiful and cheap. Drugstores sold them without a prescription. Grocery stores stocked them. Mail order houses distributed them across the countryside, for the most part concealed in any number of patent medicines from consumption cures to teething syrups for children. Though the symptoms of narcotic addiction were known, they were not recognized in Main Street America, except as signs of rare moral degeneracy in minority groups or immigrants, essentially a vice or sickness of outsiders."
U.S. Drug Enforcement Administration: https://www.dea.gov/