Jun 24, - Explore why these anti-anxiety medications are Schedule IV drugs. Benzodiazepines such as Ativan, Xanax, and Valium are a class of Schedule I drugs are seen as the most serious and Schedules II through V include. Includes narcotics in combination with other non-narcotic drugs, such as codeine Schedule 2 and Schedule 2N drugs require a properly executed, manually signed to DEA requirements for electronic prescribing of controlled substances. One substance may be Schedule I, while another is Schedule II, III, or IV. A companion to Nixon's War on Drugs, the Controlled Substances Act gave the DEA V substances involve preparing the drug with a small quantity of some narcotic.