Final answer:
Any narcotic not mixed with another drug is classified under Schedule II, which includes drugs with a high potential for abuse such as Opium, Heroin, and Fentanyl.
Step-by-step explanation:
Any prescription for a narcotic that is not mixed with another drug, regardless of concentration, will always be in Schedule II. Narcotics such as Opium, Heroin, Fentanyl, Morphine, Oxycodone, Vicodin, and methadone are considered to have a high potential for abuse which may lead to severe psychological or physical dependence. These substances are thus regulated under the Schedule II classification according to the Controlled Substances Act. Narcotics can act as an analgesic, which reduces pain without loss of consciousness, and in higher doses, they act as a narcotic, which reduces pain with drowsiness and potential loss of consciousness.