Under the Controlled Substance Act (CSA), a substance falls into one of five schedules, depending on how addictive it is.

In addition, drugs are grouped into five classes:

1. Narcotics: Primarily includes opiates
2. Depressants: Used to relieve tension, address sleep issues, and provide sedation; have effects on the central nervous system
3. Stimulants: Used for weight loss, attention deficit disorders, narcolepsy. Users can experience a state of euphoria which is highly addictive
4. Anabolic Steroids: High potential for abuse
5. Hallucinogens: Drugs that have the potential to alter the mind

The DEA also monitors the growth, sale, and use of Cannabis sativa, or marijuana.

SCHEDULE I

Drugs which the DEA determines to have no valid medical use, in addition to a high potential for addiction.

Narcotic and Non-narcotic Basic Classes

• Acetorphine
• Acetylmethadol
• Allyprodine
• Alphacetylemthadol (except LAAM)
• Bufotenine
• Dextromoramide
• Diethyltryptamine (DET)
• 2,5-Dimethoxyamphetamine (DMA)
• Dimethyltryptamine (DMT)
• Etorphine (except HCL)
• Heroin
• Ibogaine
• Ketobemidone
• Lysergic acid diethylamide (LSD)
• Marijuana
• Mescaline
• Methaqualone
• 3,4-Methylenedioxyamphetamine (MDA)
• 3,4-Methylenedioxymethamphetamine (MDMA)
• N-Ethyl-1-phenylcyclohexylamine (PCE)
• Peyote
• 1-(1-Phenylcyclohexyl)-pyrrolidine (PCPy)
• Psilocybin
• Psilocyn
• Tetrahydrocannabinols (THC)
• 1-[-1-(2-Thieny1)-cyclohexy1]-piperidine (TCP)

SCHEDULE II
A drug with a high potential for addiction, but a valid medical use.

Narcotic Basic Classes

• Alphaprodine
• Anileridine
• Cocaine
• Codeine
• Dextropropoxyphene (bulk)
• Diphenoxylate
• Diprenorphine (M50-50)
• Ethylmorphine
• Etorphine Hydrochloride (M-99)
• Glutethimide
• Hydrocodone
• Hydromorphone
• Levo-alphacetylmethadol (LAAM)
• Levorphanol
• Meperidine
• Methadone
• Morphine
• Opium, powdered
• Opium, raw
• Oxycodone
• Oxymorphone
• Poppy Straw
• Poppy Straw Concentrate
• Thebaine

Nonnarcotic Basic Classes

• Amobarbital
• Amphetamine
• Methamphetamine
• Methylphenidate
• Pentobarbital
• Phencyclidine (PCP)
• Phenmetrazine
• Phenylacetone
• Secobarbital

SCHEDULE III
A controlled substance with a low to moderate potential for drug addiction.

Narcotic Basic Classes:

• Codeine up to 90 mg/du + other ingred.
• Dihdyrocodeine up to 90mg/du + other
• Ethylmorphine pt to 15mg/du + other
• Hydrocodone up to 15mg/du + other
• Morphine up to 50mg/100ml or gm + other
• Opium up to 500mg/100ml + other active ingred.
• (Includes Paregoric)

Nonnarcotic Basic Classes:

• Anabolic Steroids
• Benzphetamine
• Butalbital
• Dronabinol Pharmaceutical Product
• Ketamine
• Methyprylon
• Pentobarbital + noncontrolled active ingred.
• Pentobarbital suppository
• Phendimetrazine
• Secobarbital + noncontrolled active ingred.
• Secobarbital suppository
• Thiopental
• Vinbarbital

SCHEDULE IV
Substance with a much lower addiction potential relative to the other schedules.

Narcotic Basic Classes:

• Dextropropoxyphene du
• Difenoxin 1mg/25ug atropine SO4/du

Non-narcotic Basic Classes:

• Alprazolam
• Barbital
• Chloral Hydrate
• Chlordiazepoxide
• Clorazepate
• Diazepam
• Diethylpropion
• Fenfluramine
• Flurazepam
• Halazepam
• Lorazepam
• Mephobarbital
• Meprobamate
• Methohexital
• Midazolam
• Oxazepam
• Paraldehyde
• Pemoline
• Pentazocine
• Phenobarbital
• Phentermine
• Prazepam
• Quazepam
• Temazepam
• Triazolam
• Zolpidem

SCHEDULE V
A controlled substance with the lowest potential for addiction.

• Buprenorphine
• Codeine Cough Preparation