Final answer:
Schedule 1 drugs are substances with a high potential for abuse and no accepted medical use in the U.S.; examples include heroin, LSD, and peyote. Drugs like fentanyl, morphine, and oxycodone are not Schedule 1 when prescribed, as they do have medical uses. The legal status of psychoactive substances, including cannabis, can change based on jurisdiction.
Step-by-step explanation:
Schedule 1 drugs are classified as substances that have a high potential for abuse, no currently accepted medical use in treatment in the United States, and a lack of accepted safety for use under medical supervision. Examples of Schedule 1 drugs would include heroin, LSD, marijuana (in jurisdictions where it remains illegal), ecstasy (MDMA), and peyote. While opium, fentanyl, morphine, oxycodone, and Vicodin are substances with abuse potential, they are not classified as Schedule 1 when prescribed, because these drugs do have accepted medical uses and may be available by prescription; however, they might be misused and could lead to severe dependency or abuse.
Some common types of psychoactive drugs outside of the Schedule 1 category include caffeine, nicotine, alcohol, and prescription medications like codeine and morphine which may have legitimate medical uses but also potential for abuse. It's important to recognize that the legal status and classification of drugs can vary depending on jurisdiction and specific circumstances, as some substances like cannabis are undergoing changes in how they are regulated.