Schedule I drugs are those that have the following characteristic according to the United States Drug Enforcement Agency (DEA):
- The drug or other substance has a high potential for abuse.
- The drug or other substance has no currently accepted medical treatment use in the U.S.
- It has a lack of accepted safety for use under medical supervision.
According to federal law, no prescriptions may be written for Schedule I substances, and they are not readily available for clinical use. (Study or research use is prohibited)