Related to Schedule III: Schedule IV, ICAI

a category of drugs that have less potential for abuse or addiction than Schedule II or I drugs. Among the substances so classified by the Drug Enforcement Agency are glutethimide and various analgesic compounds containing codeine.

Schedule I drugs High abuse potential, no accepted medical use in US–Acetorphine, acetyl methadol, allyprodine, α—acetylmethadol, bufotenine, dextromoramide, diethyltryptamine, dimethyltryptamine–DMT, etorphine, heroin, ibogaine, ketobemidone, LSD–N,N-diethyl-D-lysergamide or lysergic acid diethylamide, marijuana, mescaline, PCP–phencyclidine, peyote, phenadoxone, phenampromide, racomoramide, tetrahydrocannibol

Schedule II High abuse potential, potentially leading to severe psychologic or physical dependence; schedule II agents have acceptable medical uses, eg narcotics–alphaprodine, anileridine, cocaine, codeine, diphenoxylate, diprenorphine, etorphine HCl, ethymorphine, hydrocordone, hydromorphone, levorphanol, meperidine, methadone, morphine, oxymorphone, poppy straw concentrates, powdered opium, raw opium, thebaine and non-narcotics–amphetamine, amobarbital, methaqualone, methamphetamine, methaqualone, pentobarbital, percodan, phencyclidine, phenmetrazine, secobarbital

Schedule III High abuse potential, moderate to low physical dependence, and high psychologic dependence potential, with acceptable medical uses, which may be narcotic–eg nalorphine, paregoric, or nonnarcotic–eg aprobarbital, benzphentamine, butabarbital, chlorphentermine, chlortermine, glutethimide, mazindol, methyprylon, phendimetrazine, probarbital, talbutal, thiamylal, thiopental, vinbarbital

Schedule IV Minimal abuse potential, limited physical or psychological dependence potential, nonnarcotic, eg barbital, chloral hydrate, chlordiazepoxide, clonazepam, chlorazepate, dextropropoxyphene, diazepam, diethylpropion, ethchlorvynol, ethinamate, fenfluramine, lorazepam, mebutamate, methobarbital, meprobamate, methohexital, oxazepam, paraldehyde, phenobarbital, phentermine, prazepam

Schedule V Very low abuse/dependence potential–eg brown mixture–opium, some codeine preparations, diphenozylate preparations–Lomotil, ethylmorphine-Cidicol, opium–Donnagel-PG, terpin hydrate, or non-narcotic, eg loperamide