Idaho Drug Laws: Penalties, Charges & Treatment Options

Idaho drug laws are codified primarily in Idaho Code Title 37, Chapter 27 — the Uniform Controlled Substances Act. The state classifies controlled substances into six schedules (I through VI) under I.C. §§ 37-2705 through 37-2713, with Schedule VI reserved for marijuana and tetrahydrocannabinols — one more schedule than the five used by the federal Controlled Substances Act.

Idaho draws a firm distinction between simple possession, manufacture/delivery, and trafficking. Simple possession penalties under I.C. § 37-2732(c) vary dramatically based on the drug's schedule: possessing a Schedule I narcotic or Schedule II substance is a felony (up to 7 years and $15,000), while possessing a nonnarcotic Schedule I substance (except LSD) or a Schedule III through VI substance is a misdemeanor (up to 1 year and $1,000). LSD possession is a unique felony class with up to 3 years and a $5,000 fine.

Manufacture or delivery of controlled substances under I.C. § 37-2732(a) carries severe felony penalties. For Schedule I narcotics or Schedule II substances, the penalty is up to life imprisonment and a $25,000 fine. Trafficking under I.C. § 37-2732B triggers mandatory minimum fixed sentences that cannot be suspended, deferred, or reduced by parole.

In 2024, Idaho enacted House Bill 406, adding specific mandatory minimum sentences for fentanyl trafficking and creating the crime of drug-induced homicide. In 2025, House Bill 7 established a mandatory minimum $300 fine for misdemeanor marijuana possession. These changes reflect Idaho's increasingly strict approach to drug enforcement.

Marijuana remains fully illegal in Idaho for all purposes — recreational, medical, and industrial hemp containing more than 0% THC was prohibited until the state aligned with federal farm bill provisions. Idaho has no medical marijuana program and no decriminalization measures. The state is one of the strictest in the nation regarding cannabis.

Idaho does provide some harm-reduction protections. The state enacted a Good Samaritan overdose immunity law in 2018 (I.C. § 37-2739C) and expanded naloxone access in 2024 to allow laypersons to distribute and dispense naloxone. Pharmacists have had prescriptive authority for opioid antagonists since 2015.

Simple Possession — I.C. § 37-2732(c)

Idaho's possession penalties are tiered by drug schedule and, for marijuana, by weight:

Felony Possession

• Schedule I narcotics (e.g., heroin) or Schedule II (e.g., cocaine, meth, fentanyl, oxycodone): Up to 7 years imprisonment and/or a fine up to $15,000. (I.C. § 37-2732(c)(1))
• LSD: Up to 3 years imprisonment and/or a fine up to $5,000. (I.C. § 37-2732(c)(2))
• Marijuana — more than 3 ounces: Up to 5 years imprisonment and/or a fine up to $10,000. (I.C. § 37-2732(c)(1))

Misdemeanor Possession

• Nonnarcotic Schedule I (except LSD), Schedule III, IV, V, or VI: Up to 1 year imprisonment and/or a fine up to $1,000. (I.C. § 37-2732(c)(3))
• Marijuana — 3 ounces or less: Up to 1 year imprisonment and/or a fine up to $1,000, with a mandatory minimum fine of $300 for persons age 18 or older (effective July 1, 2025 per H.B. 7). (I.C. § 37-2732(c)(3))

Drug Paraphernalia — I.C. § 37-2734A

• Possession or use of drug paraphernalia: Misdemeanor — up to 1 year imprisonment and/or a fine up to $1,000.
• Manufacture or delivery of drug paraphernalia: Felony — up to 9 years imprisonment and/or a fine up to $30,000. (I.C. § 37-2734B)

Subsequent Offenses

Idaho law allows courts to impose enhanced penalties for repeat drug offenders. Additionally, the persistent violator statute (I.C. § 19-2514) can apply to individuals with three or more prior felony convictions, potentially resulting in a sentence of 5 years to life for any subsequent felony drug offense.

I.C. § 18-8004

0.08% (0.02% for drivers under 21; 0.04% for commercial vehicle operators)

Classification: Misdemeanor

Jail Time: Up to 6 months

Fine: Up to $1,000

License Suspension: 30-day absolute suspension, followed by 60 days restricted privileges (90 days total)

Additional: Court may require substance abuse evaluation and treatment; ignition interlock device may be ordered

Classification: Misdemeanor

Jail Time: Mandatory minimum 10 days (first 48 hours consecutive); up to 1 year

Fine: Up to $2,000

License Suspension: 1 year absolute suspension with no restricted privileges for at least 1 year

Additional: Mandatory ignition interlock device after license reinstatement

Classification: Felony (I.C. § 18-8005(6))

Jail Time: Mandatory minimum 30 days; up to 10 years in state prison

Fine: Up to $5,000

License Suspension: 1-5 years absolute suspension

Additional: Vehicle may be seized and forfeited; mandatory ignition interlock upon reinstatement

Threshold: 0.20% or higher (I.C. § 18-8004C)

First Offense: Mandatory minimum 10 days jail (48 hours consecutive); fine up to $2,000; 1-year absolute license suspension

Repeat Within 5 Years: Felony — up to 5 years imprisonment; fine up to $5,000; 1-5 years suspension

Idaho law makes it unlawful to drive under the influence of any drug, intoxicating substance, or combination of alcohol and drugs. There is no per se limit for drugs — impairment is established through officer observations, field sobriety tests, Drug Recognition Expert (DRE) evaluations, and toxicology results. The fact that a driver was legally entitled to use a drug is not a defense. (I.C. § 18-8004(1)(a))

Since 2015, Idaho pharmacists have had prescriptive authority for opioid antagonists including naloxone. Pharmacists can prescribe naloxone not only to patients at risk but also to any person or entity in a position to assist a patient experiencing an opioid overdose.

Idaho law does not explicitly authorize or prohibit standing orders for naloxone. In practice, pharmacist prescriptive authority serves a similar function by allowing direct pharmacist-to-patient prescribing without a physician's order.

In 2024, Idaho expanded its naloxone access statute to authorize laypersons to distribute and dispense naloxone, not just administer it in emergency situations.

Persons who administer naloxone in good faith to someone experiencing a suspected opioid overdose are protected from civil liability under Idaho's naloxone access provisions.

Individuals with Idaho Medicaid can obtain naloxone at no cost from pharmacies. The Idaho Department of Health and Welfare operates a Naloxone Distribution Program providing free naloxone to organizations, distributed through Kootenai County Fire & Rescue.

I.C. § 37-2722 (issuing, distributing, and dispensing of controlled substances); Idaho pharmacy practice act

Idaho operates treatment courts (including drug courts, DUI courts, mental health courts, and veterans' treatment courts) across all seven of its judicial districts. These courts divert justice-involved individuals with substance use disorders from incarceration into supervised treatment programs.

Idaho Supreme Court — Problem Solving Courts / Treatment Courts Division

Treatment courts are voluntary diversion programs that combine judicial supervision with behavioral health treatment. Participants attend counseling groups, 12-step meetings, individual counseling, and case management sessions. They have regularly scheduled court appearances and provide random urine samples.

• Ada County Drug Court (Boise) — established February 1999, sessions held at Ada County Courthouse
• Bannock County Problem-Solving Courts (Pocatello)
• Bonner County Drug Court (Sandpoint)
• Canyon County Drug Court (Caldwell)
• Twin Falls County Drug Court
• Kootenai County Drug Court (Coeur d'Alene)
• Bonneville County Drug Court (Idaho Falls)

Generally available to felony offenders with substance use disorders who meet specific criteria. Violent offenders and those with certain prior convictions may be excluded. Participation is voluntary.

https://isc.idaho.gov/solve-court/home

Mandatory Minimum Sentences in Idaho

Idaho imposes mandatory minimum sentences for drug trafficking offenses under I.C. § 37-2732B. These sentences are fixed terms — the court cannot suspend, defer, or withhold adjudication of guilt or the imposition or execution of the sentence, and the defendant is not eligible for parole until the mandatory minimum fixed term has been served.

Marijuana Trafficking (I.C. § 37-2732B(a)(1))

• 1-5 lbs or 25-50 plants: 1 year mandatory minimum; fine $5,000-$50,000
• 5-25 lbs or 50-100 plants: 3 years mandatory minimum; fine $10,000-$50,000
• 25+ lbs or 100+ plants: 5 years mandatory minimum; fine $15,000-$50,000

Cocaine Trafficking (I.C. § 37-2732B(a)(2))

• 28-200 grams: 3 years mandatory minimum; fine $10,000-$100,000
• 200-400 grams: 5 years mandatory minimum; fine $15,000-$100,000
• 400+ grams: 10 years mandatory minimum; fine $25,000-$100,000

Methamphetamine/Amphetamine Trafficking (I.C. § 37-2732B(a)(4))

• 28+ grams: 5 years mandatory minimum (manufacturing: up to life); fine $10,000-$25,000
• Attempted manufacturing: 2 years mandatory minimum; up to 15 years

Fentanyl Trafficking (I.C. § 37-2732B, as amended by H.B. 406, effective July 1, 2024)

• 4-14 grams: 3 years mandatory minimum; fine minimum $10,000
• 14-28 grams: 5 years mandatory minimum; fine minimum $15,000
• 28+ grams: 10 years mandatory minimum; fine minimum $25,000

Heroin Trafficking (I.C. § 37-2732B(a)(3))

• 2-7 grams: 3 years mandatory minimum
• 7-28 grams: 10 years mandatory minimum
• 28+ grams: 15 years mandatory minimum

Marijuana Possession — Mandatory Minimum Fine (H.B. 7, effective July 1, 2025)

Misdemeanor possession of 3 ounces or less of marijuana now carries a mandatory minimum fine of $300 for persons age 18 or older.

Treatment courts across all 7 judicial districts offer court-supervised rehabilitation combining behavioral health treatment with judicial accountability. See Drug Courts section for details.

Idaho courts may withhold judgment under I.C. § 19-2601 for eligible defendants, placing them on probation with conditions that may include substance abuse treatment. Upon successful completion, the case can be dismissed.

Under Idaho's 'rider' program (I.C. § 19-2601(4)), a judge may sentence a defendant to prison but retain jurisdiction for up to 365 days. During this period, the defendant participates in intensive programming (including substance abuse treatment) at an Idaho Department of Correction facility. If the defendant performs well, the court may suspend the sentence and place them on probation.

Idaho operates mental health courts in several districts for individuals whose criminal behavior is related to mental illness and/or co-occurring substance use disorders.

Veterans' treatment courts serve eligible military veterans with substance use or mental health issues, providing peer mentoring and specialized treatment.

Courts frequently impose substance abuse evaluation and treatment as conditions of probation for drug offenses, including mandatory drug testing, counseling, and participation in 12-step or similar recovery programs.

2025: Governor Brad Little signed H.B. 7, establishing a mandatory minimum fine of $300 for misdemeanor marijuana possession (3 ounces or less) for persons age 18 or older, effective July 1, 2025. This was characterized as one of the steepest mandatory minimum fines for low-level marijuana possession in the United States.

2024: Governor Little signed H.B. 406, creating mandatory minimum sentences for fentanyl trafficking (3-10 years depending on quantity) and establishing the crime of drug-induced homicide, effective July 1, 2024. The law was passed with strong support from law enforcement (House: 55-13, Senate: 29-7).

2024: Idaho expanded its naloxone access statute to authorize laypersons to distribute and dispense naloxone, not just administer it during emergencies. Previously, only health professionals could distribute naloxone.

2018: Idaho enacted the Good Samaritan overdose immunity law (I.C. § 37-2739C), providing limited immunity from possession and paraphernalia charges for individuals who call 911 during a drug-related medical emergency. Idaho became the 42nd state to adopt such a law.