Schedule INo accepted medical use
Examples: heroin, marijuana, LSD
Schedule IIHigh abuse potential with severe dependence liability
Examples: morphine, methadone, oxycodone, amphetamines, secobarbital
Schedule IIILess abuse potential than schedule I and schedule II substances
Examples: acetaminophen that contains limited quantities of certain narcotic drugs
Schedule IVLess abuse potential than schedule III substances
Examples: phenobarbital, benzodiazepines, propoxyphene, pentazocine, phentermine
Schedule VLeast abuse potential of scheduled substances
Examples: buprenorphine, propylhexedrine