Prohibition of Drugs

The prohibition of drugs through sumptuary legislation or religious law is a common means of attempting to prevent drug use.

While most drugs are legal to possess, many governments regulate the manufacture, distribution, marketing, and sale of some drugs, for instance through a prescription system. Only certain drugs are banned with a "blanket prohibition" against all use. However, a continuing problem remains in effect, as the prohibited drugs continue to be available through illegal trade, see illegal drug trade, also known as the Black Market. The most widely banned substances include psychoactive drugs, although blanket prohibition also extends to some steroids and other drugs. Many governments do not criminalize the possession of a limited quantity of certain drugs for personal use, while still prohibiting their sale or manufacture, or possession in large quantities. Some laws set a specific volume of a particular drug, above which is considered ipso jure to be evidence of trafficking or sale of the drug. The hypothesis that the prohibition of drugs generates violence is consistent with research done over long time-series and cross-country facts.

Islamic countries mostly prohibit the use of alcohol. Many non-Islamic governments levy a sin tax on alcohol and tobacco products, and restrict alcohol and tobacco from sales or gifts to minors. Other common restrictions include bans on outdoor drinking and indoor smoking. The United States (1920–1933), Finland (1919–1932), Norway (1916–1927), Canada (1901–1948), Iceland (1915–1922) and the Russian Empire/USSR (1914–1925) had alcohol prohibition.