Heroine and LSD are examples of Schedule square drugs.

Heroine and LSD are examples of Schedule I drugs.<br /><br />Schedule I drugs are classified as having a high potential for abuse, no accepted medical use in the United States, and a lack of accepted safety for use under medical supervision. This classification is determined by the Drug Enforcement Administration (DEA) in the United States.<br /><br />It is important to note that the classification of drugs can vary by country, and the specific laws and regulations regarding drug scheduling may differ.