The past fifty years have witnessed considerable debate among policy makers over the legal status of hallucinogens, although that debate has yet to reach a clear resolution. Five decades of illicit hallucinogen use by millions of Americans, coupled with legitimate scientific research, have prompted many people to challenge government claims that hallucinogens represent a serious health risk to individuals and to the nation in general. At the heart of this disagreement are the standards that since 1970 have been used to classify certain drugs as illicit while others are listed as legal.

The DEA and Drug Classifications

In 1970, Congress authorized the Food and Drug Administration (FDA) to study all drugs, both licit and illicit, to determine which are potentially dangerous and should be strictly regulated as controlled substances. The Controlled Substances Act, Title II of the Comprehensive Drug Abuse Prevention and...