Colorado § 18-18-404 - Unlawful use of a controlled substance.

Full text of Colorado Colorado Revised Statutes § 18-18-404 — Unlawful use of a controlled substance., with citation guidance and answers to common questions.

§ 18-18-404. Unlawful use of a controlled substance.

(1) (a) Except as is otherwise provided for offenses concerning marijuana and marijuana concentrate in sections 18-18-406 and 18-18-406.5, or for natural medicine or natural medicine product in section 18-18-434, article 170 of title 12, or article 50 of title 44, any person who uses any controlled substance, except when it is dispensed by or under the direction of a person licensed or authorized by law to prescribe, administer, or dispense the controlled substance for bona fide medical needs, commits a level 2 drug misdemeanor.

(b) Repealed.

(1.1) Repealed.

(2) and (3) (Deleted by amendment, L. 2010, (HB 10-1352), ch. 259, p. 1163, § 2, effective August 11, 2010.)

(4) Repealed.

Source: L. 92: Entire article R&RE, p. 354, § 1, effective July 1. L. 98: (4) added, p. 1435, § 4, effective July 1. L. 99: IP(1) amended, p. 799, § 17, effective July 1. L. 2000: (4) amended, p. 1359, § 41, effective July 1, 2001. L. 2002: (4) amended, p. 1583, § 12, effective July 1. L. 2003: (1) amended and (1.1) added, p. 2681, § 2, effective July 1; (3) amended, p. 2429, § 2, effective July 1. L. 2007: (1)(b) and (1.1) repealed, p. 1689, § 10, effective July 1. L. 2009: (4) repealed, (HB 09-1266), ch. 347, p. 1815, § 4, effective August 5. L. 2010: (1)(a), (2), and (3) amended, (HB 10-1352), ch. 259, p. 1163, § 2, effective August 11. L. 2012: (1)(a) amended, (SB 12-020), ch. 225, p. 988, § 5, effective May 29. L. 2013: (1)(a) amended, (SB 13-250), ch. 333, p. 1909, § 9, effective October 1. Initiated 2022: (1)(a) amended, Proposition 122, L. 2022, effective upon proclamation of the Governor, December 27, 2022. L. 2023: (1)(a) amended, (SB 23-290), ch. 249, p. 1412, § 25, effective July 1.

Editor's note: (1) This section is similar to former § 18-18-104 as it existed prior to 1992.

(2) This section was amended by Proposition 122, with the proclamation of the governor on December 27, 2022. The vote count for the measure at the general election held November 8, 2022, was as follows:

FOR: 1,296,992

AGAINST: 1,121,124

Cross references: For the legislative intent contained in the 2003 act amending subsection (1) and enacting subsection (1.1), see section 1 of chapter 424, Session Laws of Colorado 2003. For the legislative declaration in the 2012 act amending subsection (1)(a), see section 1 of chapter 225, Session Laws of Colorado 2012.

ANNOTATION

Law reviews. For article, "Felony Sentencing in Colorado", see 18 Colo. Law. 1689 (1989).

Equal protection is not violated when a defendant is charged for the same conduct under both this section and § 18-18-405(1)(a) because unlawful use and unlawful possession are distinct offenses that each require proof of at least one fact that the other does not. People v. District Ct. of 11th Jud. Dist., 964 P.2d 498 (Colo. 1998).

This section and § 18-18-405 do not contain identical elements for purposes of an equal protection analysis. The general assembly's choice to classify possession as a graver offense than use is reasonably related to the general purposes of the criminal legislation. Campbell v. People, 73 P.3d 11 (Colo. 2003).

As written, this section is clear and unambiguous in exempting § 18-18-406.5 from its provisions, including the treatment option. People v. Goodale, 78 P.3d 1103 (Colo. 2003).

By intentionally omitting marihuana from the treatment option available under this section, the general assembly explicitly chose to offer the treatment option only to those addicted to other substances. Such a classification has a rational basis based upon real in fact differences between the substances and is not completely arbitrary or irrational. People v. Goodale, 78 P.3d 1103 (Colo. 2003).

Under § 18-18-404 (3), defendant's guilty plea is tantamount to a conviction in that it establishes guilt. People v. Roberts, 865 P.2d 938 (Colo. App. 1993).

Trial court exceeded its jurisdiction by applying sentencing alternative under subsection (3) applicable to unlawful "use" of controlled substance offenses to resentencing of probationer convicted of "possession" of a controlled substance under § 18-18-405. People v. Hutchings, 881 P.2d 466 (Colo. App. 1994).

Court order to surrender a driver's license and pay certain victim's fees and a drug surcharge fee was not erroneous where the defendant pled guilty to the charge and where the statute authorizes the court to impose "reasonable conditions." People v. Roberts, 865 P.2d 938 (Colo. App. 1993).

While an individual may unlawfully possess a controlled substance without voluntarily using it, it is simply not feasible for an individual to voluntarily use a controlled substance without also possessing it. People v. Villapando, 984 P.2d 51 (Colo. 1999).

Source: official Colorado text · Last verified 2026-08-27

Frequently Asked Questions About Colorado § 18-18-404

What does Colorado Revised Statutes § 18-18-404 cover?

Section 18-18-404 ("Unlawful use of a controlled substance.") is part of the Colorado Revised Statutes, the codified statutory law of Colorado. It sets out the legal rule or procedure described in the text above. Statutes are amended regularly, so always verify against the official source.

How do I cite Colorado § 18-18-404?

A common citation format is "Colorado Revised Statutes § 18-18-404" (Colorado). Legal writing may require the code abbreviation, section number, and year or edition. Match the style required by your court, professor, or publisher.

Is this the official text of Colorado law?

No. This page is for research and education and may not include the most recent amendments. For official current law, check the Colorado official source linked on this page or consult a licensed Colorado attorney.

How does Colorado § 18-18-404 apply to my situation?

Statutes are interpreted in context, and application depends on your specific facts. Only a licensed attorney in Colorado can advise on how this section applies to you. Contact your state or local bar association for a referral.

Sources & Verification

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