The prohibition of drugs through sumptuary legislation or religious law is a common means of attempting to prevent the recreational use of the prohibited drugs. While some drugs are illegal to possess, many governments regulate the manufacture, distribution, marketing, sale and use of certain drugs, for instance through a prescription system. Only certain drugs are banned with a "blanket prohibition" against all possession or use. 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 o