Colorado Controlled Substance List: Schedules, Penalties, and Sealing

Colorado’s controlled substance schedules and penalties follow a five-tier classification borrowed from federal law, with criminal consequences that scale by schedule, quantity, and whether the conduct is simple possession or distribution. A first possession of four grams or less of a Schedule I or II drug is a level 1 drug misdemeanor topping out at 18 months in jail. Large-scale distribution of the same drugs reaches a level 1 drug felony with a mandatory minimum of eight years in prison and fines up to $1,000,000.

The Five Schedules

Colorado sorts controlled substances by abuse potential, accepted medical use, and how safely they can be used under medical supervision. The schedule a drug falls under drives every penalty that follows.

  • Schedule I: High abuse potential, no recognized medical use. Heroin, LSD, and MDMA.
  • Schedule II: High abuse potential, accepted medical use under tight restrictions. Cocaine, methamphetamine, fentanyl, and oxycodone.
  • Schedule III: Moderate abuse potential with accepted medical use. Anabolic steroids and ketamine.
  • Schedule IV: Lower abuse potential than Schedule III. Alprazolam (Xanax) and diazepam (Valium).
  • Schedule V: The lowest abuse potential among controlled substances, such as cough preparations containing limited codeine.

Schedule I and II substances draw the harshest penalties. Schedule III through V offenses are generally charged at lower levels, often as misdemeanors even for distribution of small amounts.

Possession Penalties

The dividing line for Schedule I and II possession is four grams. Below that, the charge is a misdemeanor. Above it, a felony.

Fentanyl Possession Is Treated Differently

Fentanyl, carfentanil, and related synthetic opioids get their own, stricter rules. Possessing one gram or less of a fentanyl-containing substance is a level 1 drug misdemeanor. Between one and four grams is automatically a level 4 drug felony regardless of prior record.1Justia Law. Colorado Code 18-18-403.5 – Unlawful Possession of a Controlled Substance If the substance is more than 60 percent fentanyl by composition, the charge jumps to a level 2 drug felony, carrying 4 to 8 years in prison and fines up to $750,000.2Justia Law. Colorado Code 18-1.3-401.5 – Sentencing for Drug Felonies

Distribution and Manufacturing Penalties

Colorado uses one statute for distributing and manufacturing. Weight matters far more than whether someone was selling or producing. Five penalty tiers apply.

Special Offender Enhancements

Some circumstances automatically bump any drug felony up to a level 1 drug felony, regardless of quantity. Distributing a controlled substance within 1,000 feet of a school, on school grounds, in a school vehicle, on a public playground, or in public housing triggers the enhancement. So does hiring or pressuring a minor to help with any part of the operation.4Justia Law. Colorado Code 18-18-407 – Special Offender The mandatory eight-year minimum applies to those cases.

Mandatory Drug Offender Surcharges

Every drug conviction in Colorado carries a surcharge on top of any court-imposed fine. Courts can reduce the amount only if the defendant proves inability to pay by clear and convincing evidence.5FindLaw. Colorado Code 18-19-103 – Drug Offender Surcharge

  • Level 1 drug felony: $4,500
  • Level 2 drug felony: $3,000
  • Level 3 drug felony: $2,000
  • Level 4 drug felony: $1,500
  • Level 1 drug misdemeanor: $1,000
  • Level 2 drug misdemeanor: $300

The surcharge is separate from fines, restitution, and court costs, and it can exceed the fine itself at the misdemeanor levels.

Drug Paraphernalia

Possessing drug paraphernalia is a drug petty offense punishable by a fine of up to $100. The statute applies when a person knows, or reasonably should know, that an item could be used to violate state drug laws. No proof of actual intent is required.6Colorado Public Law. Colorado Code 18-18-428 – Possession of Drug Paraphernalia

Selling or delivering paraphernalia, or possessing it with intent to sell, is a level 2 drug misdemeanor. The maximum is 364 days in jail and a $750 fine.7Colorado Public Law. Colorado Code 18-18-429 – Manufacture, Sale, or Delivery of Drug Paraphernalia Drug-checking supplies are specifically excluded from the paraphernalia definition. Fentanyl test strips and similar testing equipment used to identify the strength, purity, or contents of a substance are legal to possess and distribute.8Colorado Department of Public Health and Environment. Colorado Public Health Harm Reduction Legislation

Driving Under the Influence of Drugs

Colorado prosecutes drug-impaired driving under the same DUI statute as alcohol. Driving while impaired by any drug, or by a combination of drugs and alcohol, is a misdemeanor for the first three offenses. A fourth or later DUI, counting prior DUI, DUI per se, DWAI, vehicular homicide, or vehicular assault convictions, is a class 4 felony.9Justia Law. Colorado Code 42-4-1301 – Driving Under the Influence

Marijuana uses a reasonable-inference standard. A blood level of 5 nanograms or more of THC per milliliter permits a jury to infer impairment, but the inference is rebuttable; the driver can present evidence that they were not actually impaired.10National Conference of State Legislatures. Drugged Driving – Marijuana-Impaired Driving For other drugs there is no numeric threshold. Prosecutors rely on officer observations, field sobriety tests, drug recognition expert evaluations, and toxicology.

What’s Carved Out: Marijuana and Natural Medicine

Two substantial categories sit outside the schedule-and-penalty framework for adults 21 and older.

Adults can legally possess up to two ounces of cannabis, with retail dispensary purchases capped at one ounce per transaction, and can gift up to two ounces to another adult without payment.11Colorado Department of Revenue. Laws About Cannabis Use Possession beyond two ounces, unlicensed sales, and providing cannabis to anyone under 21 remain criminal.

Proposition 122, passed in 2022, decriminalized personal use of several naturally occurring psychedelics for adults 21 and older: psilocybin, psilocyn, DMT, ibogaine, and mescaline (not including peyote). Adults can possess, grow, and share these substances without state criminal charges. Through June 1, 2026, only psilocybin and psilocyn are available through the state’s regulated access program at licensed healing centers; after that date, regulators may add the other three if the Natural Medicine Advisory Board recommends it.12Colorado General Assembly. Proposition 122 – Access to Natural Psychedelic Substances None of this changes federal law, which still classifies both marijuana and these psychedelics as controlled substances.

Overdose Immunity

Colorado’s Good Samaritan law grants immunity from arrest and prosecution to both the person who calls 911 to report a drug or alcohol overdose and the person who overdosed. Covered offenses include possession of a controlled substance, drug use, possession of marijuana beyond legal limits, and paraphernalia possession.13FindLaw. Colorado Code 18-1-711 – Immunity for Persons Who Report Emergency Drug or Alcohol Overdose Events

To qualify, the caller must act in good faith, remain at the scene until help arrives, identify themselves, and cooperate with responders. The immunity reaches only offenses arising from the same events as the overdose. It does not cover unrelated charges, and it does not shield distribution or manufacturing offenses above the small-quantity fentanyl threshold.

Sealing a Drug Conviction

After completing a sentence, including probation or parole, a person convicted of a drug offense can petition to seal the record. A sealed record is no longer visible to the public, employers, or landlords.14FindLaw. Colorado Code 24-72-706 – Sealing of Conviction and Criminal Justice Records The waiting period depends on the offense:

  • Drug petty offenses, including paraphernalia possession: 1 year
  • Drug misdemeanors and level 4 drug felonies under the fentanyl-specific possession statute: 2 years
  • Level 3 and level 4 drug felonies, and class 1 misdemeanors: 3 years
  • All other eligible offenses: 5 years

The clock runs from the later of final disposition or release from supervision. Records cannot be sealed while restitution remains unpaid, unless the restitution order has been vacated.