Laudanum and concentrated versions. For example, in 1915, Frank S. Betz Co., a medical supply company in Hammond, Indiana, advertised Tincture of Opium, U.S.P., for $2.90 per lb., Tincture of Opium Camphorated, U.S.P, for 85 cents per lb., and Tincture of Opium Deodorized, for $2.85 per lb. Four versions of opium as a fluid extract were also offered: (1) Opium, Concentrated (assayed) "For making Tincture Opii (Laudanum) U.S.P. Four times the strength of the regular U.S.P." tincture, for $9.35 per pint; (2) Opium, Camphorated Conc. "1 oz. making 8 ozs. Tr. Opii Camphorated U.S.P (Paregoric)" for $2.00 per pint; (3) Opium,
Laudanum other such drugs continued to be legally available without prescription as long as they were labeled. It is estimated that sale of patent medicines containing opiates decreased by 33% after labeling was mandated. In 1906 in Britain and in 1908 in Canada "laws requiring disclosure of ingredients and limitation of narcotic content were instituted". The Harrison Narcotics Tax Act of 1914 restricted the manufacture and distribution of opiates, including laudanum, and coca derivatives in the US. This was followed by France's "" in 1916, and Britain's Dangerous Drugs Act in 1920. Laudanum was supplied to druggists and physicians in regular