# DEA Synthetic Cannabinoids Schedule I June 2026 Updates

> **Author:** Benjamin Caplan, MD (ABFM Board Certified, MA Lic. #240562, NPI: 1962722637)
> **Publisher:** CED Clinic (https://cedclinic.com)
> **Canonical URL:** https://cedclinic.com/dea-synthetic-cannabinoids-schedule-i-june-2026/
> **Published:** 2026-06-06T01:24:32-04:00 | **Last Modified / Clinically Audited:** 2026-09-29T00:23:16-04:00
> **Clinical Summary:** Explore the DEA synthetic cannabinoids Schedule I June 2026 updates impacting clinical research and regulatory controls on novel psychoactive substances.

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Policy WatchJune 06, 2026. 20 regulatory items above the clinical relevance threshold of 40. Sources include Federal Register, regulations.gov, and regulatory RSS feeds. Listed in descending order of relevance score.

Score 70Federal Register

[Schedules of Controlled Substances: Rescheduling of Food and Drug Administration Approved Products Containing Marijuana From Schedule I to Schedule III; Corresponding Change to Permit Requirements](https://www.federalregister.gov/documents/2026/04/28/2026-08176/schedules-of-controlled-substances-rescheduling-of-food-and-drug-administration-approved-products)

The DEA proposes rescheduling FDA-approved products containing marijuana from Schedule I to Schedule III, potentially easing access for clinicians and patients while maintaining federal control.

[Read more →](https://www.federalregister.gov/documents/2026/04/28/2026-08176/schedules-of-controlled-substances-rescheduling-of-food-and-drug-administration-approved-products)

Score 70Federal Register

[Schedules of Controlled Substances: Placement of MDMB-4en-PINACA in Schedule I](https://www.federalregister.gov/documents/2026/04/24/2026-08104/schedules-of-controlled-substances-placement-of-mdmb-4en-pinaca-in-schedule-i)

The DEA placed the synthetic cannabinoid MDMB-4en-PINACA into Schedule I, classifying it as having a high potential for abuse and no accepted medical use, impacting its legality and [clinical research](https://cedclinic.com/cannabis-based-therapies-smoking-cessation/).

[Read more →](https://www.federalregister.gov/documents/2026/04/24/2026-08104/schedules-of-controlled-substances-placement-of-mdmb-4en-pinaca-in-schedule-i)

Score 70Federal Register

[Schedules of Controlled Substances: Placement of 3-Methoxyphencyclidine (1-(1-(3-Methoxyphenyl)cyclohexyl)piperidine) in Schedule I](https://www.federalregister.gov/documents/2026/03/23/2026-05618/schedules-of-controlled-substances-placement-of-3-methoxyphencyclidine)

The DEA placed 3-Methoxyphencyclidine (3-MeO-PCP) into Schedule I, classifying it as having a high potential for abuse and no currently accepted medical use, which may impact research or clinical interpretations involving similar substances.

[Read more →](https://www.federalregister.gov/documents/2026/03/23/2026-05618/schedules-of-controlled-substances-placement-of-3-methoxyphencyclidine)

Score 70Federal Register

[Schedules of Controlled Substances: Temporary Placement of Bromazolam in Schedule I](https://www.federalregister.gov/documents/2026/03/16/2026-05064/schedules-of-controlled-substances-temporary-placement-of-bromazolam-in-schedule-i)

The DEA temporarily placed bromazolam, a benzodiazepine sometimes found in unregulated cannabis products, into Schedule I, making it illegal and impacting patient safety and clinician practices.

[Read more →](https://www.federalregister.gov/documents/2026/03/16/2026-05064/schedules-of-controlled-substances-temporary-placement-of-bromazolam-in-schedule-i)

Score 70Federal Register

[Schedules of Controlled Substances: Placement of Clonazolam, Diclazepam, Etizolam, Flualprazolam, and Flubromazolam in Schedule I of the Controlled Substances Act](https://www.federalregister.gov/documents/2026/03/02/2026-04112/schedules-of-controlled-substances-placement-of-clonazolam-diclazepam-etizolam-flualprazolam-and)

The DEA placed five benzodiazepines—clonazolam, diclazepam, etizolam, flualprazolam, and flubromazolam—into Schedule I, impacting clinicians who may encounter patients using these substances alongside cannabis.

[Read more →](https://www.federalregister.gov/documents/2026/03/02/2026-04112/schedules-of-controlled-substances-placement-of-clonazolam-diclazepam-etizolam-flualprazolam-and)

Score 70Federal Register

[Schedules of Controlled Substances: Temporary Placement of 2-Fluorodeschloroketamine in Schedule I](https://www.federalregister.gov/documents/2026/01/20/2026-00954/schedules-of-controlled-substances-temporary-placement-of-2-fluorodeschloroketamine-in-schedule-i)

The DEA temporarily placed 2-Fluorodeschloroketamine in Schedule I, potentially impacting research and clinical use should this substance be considered as an adjunct therapy alongside cannabis.

[Read more →](https://www.federalregister.gov/documents/2026/01/20/2026-00954/schedules-of-controlled-substances-temporary-placement-of-2-fluorodeschloroketamine-in-schedule-i)

Score 70Federal Register

[Schedules of Controlled Substances: Placement of 4-Fluoroamphetamine in Schedule I](https://www.federalregister.gov/documents/2026/01/15/2026-00633/schedules-of-controlled-substances-placement-of-4-fluoroamphetamine-in-schedule-i)

This action places 4-fluoroamphetamine in Schedule I, meaning it has a high potential for abuse and no currently accepted medical use, which may impact research involving similar compounds or patient reporting of substance use.

[Read more →](https://www.federalregister.gov/documents/2026/01/15/2026-00633/schedules-of-controlled-substances-placement-of-4-fluoroamphetamine-in-schedule-i)

Score 70Federal Register

[Schedules of Controlled Substances: Placement of N-Pyrrolidino Metonitazene and N-Pyrrolidino Protonitazene in Schedule I](https://www.federalregister.gov/documents/2026/01/12/2026-00362/schedules-of-controlled-substances-placement-of-n-pyrrolidino-metonitazene-and-n-pyrrolidino)

The DEA placed N-pyrrolidino metonitazene and N-pyrrolidino protonitazene into Schedule I, meaning these synthetic opioids have no accepted medical use and high abuse potential, potentially impacting differential diagnoses for clinicians.

[Read more →](https://www.federalregister.gov/documents/2026/01/12/2026-00362/schedules-of-controlled-substances-placement-of-n-pyrrolidino-metonitazene-and-n-pyrrolidino)

Score 70Federal Register

[Schedules of Controlled Substances: Placement of N-Desethyl Isotonitazene and N-Piperidinyl Etonitazene in Schedule I](https://www.federalregister.gov/documents/2025/12/23/2025-23717/schedules-of-controlled-substances-placement-of-n-desethyl-isotonitazene-and-n-piperidinyl)

The DEA placed N-desethyl isotonitazene and N-piperidinyl etonitazene into Schedule I, impacting clinicians by restricting their use and potentially affecting patient testing due to cross-reactivity with fentanyl test strips.

[Read more →](https://www.federalregister.gov/documents/2025/12/23/2025-23717/schedules-of-controlled-substances-placement-of-n-desethyl-isotonitazene-and-n-piperidinyl)

Score 70Federal Register

[Schedules of Controlled Substances: Placement of 4F-MDMB-BUTICA, ADB-4en-PINACA, 5F-EDMB-PICA, and MMB-FUBICA in Schedule I](https://www.federalregister.gov/documents/2025/12/16/2025-22963/schedules-of-controlled-substances-placement-of-4f-mdmb-butica-adb-4en-pinaca-5f-edmb-pica-and)

The DEA placed four synthetic cannabinoids into Schedule I, classifying them as having a high potential for abuse and no accepted medical use, impacting clinicians and patients encountering these substances.

[Read more →](https://www.federalregister.gov/documents/2025/12/16/2025-22963/schedules-of-controlled-substances-placement-of-4f-mdmb-butica-adb-4en-pinaca-5f-edmb-pica-and)

Score 70Federal Register

[Schedules of Controlled Substances: Temporary Placement of Bromazolam in Schedule I](https://www.federalregister.gov/documents/2025/12/15/2025-22763/schedules-of-controlled-substances-temporary-placement-of-bromazolam-in-schedule-i)

The DEA temporarily placed bromazolam, a benzodiazepine sometimes found in unregulated cannabis products, into Schedule I, classifying it as having a high potential for abuse and no accepted medical use.

[Read more →](https://www.federalregister.gov/documents/2025/12/15/2025-22763/schedules-of-controlled-substances-temporary-placement-of-bromazolam-in-schedule-i)

Score 70Federal Register

[Schedules of Controlled Substances: Placement of CUMYL-PEGACLONE in Schedule I](https://www.federalregister.gov/documents/2025/12/11/2025-22495/schedules-of-controlled-substances-placement-of-cumyl-pegaclone-in-schedule-i)

The DEA placed cumyl-pegaclone, a synthetic cannabinoid, into Schedule I, meaning it has a high potential for abuse and no currently accepted medical use in the United States.

[Read more →](https://www.federalregister.gov/documents/2025/12/11/2025-22495/schedules-of-controlled-substances-placement-of-cumyl-pegaclone-in-schedule-i)

Score 70Federal Register

[Schedules of Controlled Substances: Placement of 4-Chloromethcathinone in Schedule I](https://www.federalregister.gov/documents/2025/11/17/2025-20004/schedules-of-controlled-substances-placement-of-4-chloromethcathinone-in-schedule-i)

The DEA placed 4-Chloromethcathinone in Schedule I, meaning it has a high potential for abuse and no currently accepted medical use, which may impact clinicians encountering novel synthetic cannabinoids.

[Read more →](https://www.federalregister.gov/documents/2025/11/17/2025-20004/schedules-of-controlled-substances-placement-of-4-chloromethcathinone-in-schedule-i)

Score 70Federal Register

[Schedules of Controlled Substances: Temporary Placement of Ethyleneoxynitazene, Methylenedioxynitazene, 5-Methyl Etodesnitazene, N-Desethyl Etonitazene, N-Desethyl Protonitazene, N,N-Dimethylamino Etonitazene, and N-Pyrrolidino Isotonitazene in Schedule I](https://www.federalregister.gov/documents/2025/10/15/2025-19542/schedules-of-controlled-substances-temporary-placement-of-ethyleneoxynitazene-methylenedioxynitazene)

The DEA temporarily placed six synthetic opioids into Schedule I, impacting cannabis clinicians and patients by potentially altering differential diagnoses and requiring awareness of novel psychoactive substance involvement in adverse events.

[Read more →](https://www.federalregister.gov/documents/2025/10/15/2025-19542/schedules-of-controlled-substances-temporary-placement-of-ethyleneoxynitazene-methylenedioxynitazene)

Score 70Federal Register

[Schedules of Controlled Substances: Placement of MDMB-4en-PINACA in Schedule I](https://www.federalregister.gov/documents/2025/10/02/2025-19348/schedules-of-controlled-substances-placement-of-mdmb-4en-pinaca-in-schedule-i)

The DEA placed the synthetic cannabinoid MDMB-4en-PINACA into Schedule I, classifying it as having a high potential for abuse and no accepted medical use, impacting its legality and [clinical research](https://cedclinic.com/cannabis-based-therapies-smoking-cessation/).

[Read more →](https://www.federalregister.gov/documents/2025/10/02/2025-19348/schedules-of-controlled-substances-placement-of-mdmb-4en-pinaca-in-schedule-i)

Score 70Federal Register

[Schedules of Controlled Substances: Placement of Seven Specific Fentanyl-Related Substances in Schedule I](https://www.federalregister.gov/documents/2025/09/18/2025-18103/schedules-of-controlled-substances-placement-of-seven-specific-fentanyl-related-substances-in)

This DEA rule places seven fentanyl-related substances into Schedule I, potentially impacting access for research or clinical use and requiring cannabis clinicians to remain vigilant regarding substance control regulations.

[Read more →](https://www.federalregister.gov/documents/2025/09/18/2025-18103/schedules-of-controlled-substances-placement-of-seven-specific-fentanyl-related-substances-in)

Score 70Federal Register

[Schedules of Controlled Substances: Temporary Placement of N-pyrrolidino metonitazene and N-pyrrolidino protonitazene in Schedule I](https://www.federalregister.gov/documents/2025/08/15/2025-15566/schedules-of-controlled-substances-temporary-placement-of-n-pyrrolidino-metonitazene-and)

The DEA temporarily placed N-pyrrolidino metonitazene and N-pyrrolidino protonitazene into Schedule I, impacting cannabis clinicians and patients due to potential misidentification or adulteration of products.

[Read more →](https://www.federalregister.gov/documents/2025/08/15/2025-15566/schedules-of-controlled-substances-temporary-placement-of-n-pyrrolidino-metonitazene-and)

Score 70Federal Register

[Schedules of Controlled Substances: Placement of Clonazolam, Diclazepam, Etizolam, Flualprazolam, and Flubromazolam in Schedule I of the Controlled Substances Act](https://www.federalregister.gov/documents/2025/07/25/2025-14022/schedules-of-controlled-substances-placement-of-clonazolam-diclazepam-etizolam-flualprazolam-and)

The DEA placed five benzodiazepines—clonazolam, diclazepam, etizolam, flualprazolam, and flubromazolam—into Schedule I, impacting clinicians who may encounter patients using these substances concurrently with cannabis.

[Read more →](https://www.federalregister.gov/documents/2025/07/25/2025-14022/schedules-of-controlled-substances-placement-of-clonazolam-diclazepam-etizolam-flualprazolam-and)

Score 70Federal Register

[Exempt Chemical Preparations Under the Controlled Substances Act](https://www.federalregister.gov/documents/2025/07/01/2025-12198/exempt-chemical-preparations-under-the-controlled-substances-act)

The FDA clarified that certain hemp-derived cannabinoid products meeting specific criteria are exempt from the Controlled Substances Act, impacting the legal status for clinicians and patients.

[Read more →](https://www.federalregister.gov/documents/2025/07/01/2025-12198/exempt-chemical-preparations-under-the-controlled-substances-act)

Score 70Federal Register

[Schedules of Controlled Substances: Temporary Placement of Seven Benzimidazole-Opioids in Schedule I](https://www.federalregister.gov/documents/2025/06/26/2025-11462/schedules-of-controlled-substances-temporary-placement-of-seven-benzimidazole-opioids-in-schedule-i)

The DEA temporarily placed seven benzimidazole-opioids into Schedule I, potentially impacting research and clinical access should these substances be investigated for cannabis-opioid synergy or as alternatives for [pain management](https://cedclinic.com/cbd-cbg-topicals-for-eczema/).

[Read more →](https://www.federalregister.gov/documents/2025/06/26/2025-11462/schedules-of-controlled-substances-temporary-placement-of-seven-benzimidazole-opioids-in-schedule-i)

Digest-Level Clinical Commentary

Dr. Caplan’s Take
What strikes me most about this digest is that only item 1 directly addresses cannabis policy while the remaining 19 entries concern synthetic cannabinoids and novel psychoactive substances, which suggests the DEA’s scheduling efforts are primarily focused on closing loopholes in designer drug markets rather than clarifying the legal framework for [evidence-based cannabis](https://cedclinic.com/jama-cannabis-review-physician-analysis/) therapeutics. The rescheduling of FDA-approved cannabis products from Schedule I to Schedule III in item 1 is clinically significant because it could facilitate legitimate research and reduce prescribing barriers, yet the volume of synthetic compound placements indicates we still lack adequate regulatory clarity around which cannabinoid formulations and delivery systems constitute approved medical products versus street drugs. As a practitioner, this landscape means I must remain cautious about recommending whole-plant cannabis or novel cannabinoid products until we have better clinical data, while recognizing

Clinical Perspective

The regulatory actions documented here reflect an ongoing pattern of synthetic drug scheduling aimed at controlling novel psychoactive substances that emerge faster than traditional legislative processes can address them. Most items involve synthetic cannabinoids, benzodiazepines, cathinones, and nitazenes, which are designer drugs created to circumvent existing controlled substance laws by altering the chemical structure of known drugs of abuse. From a clinical standpoint, these scheduling actions address a genuine [public health](https://cedclinic.com/cannabis-mold-contamination-risks-recall-safety/) concern, as these synthetic compounds often present unpredictable toxicity profiles and have contributed to emergency department visits and overdose deaths, particularly the opioid-like nitazenes that have recently appeared in illicit drug supplies.

Controlled SubstancesDrug SchedulingSynthetic DrugsRegulatory AffairsFDA

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Related Articles

- Schedules of Controlled Substances: Placement of Diphenidine in Schedule I

- Schedules of Controlled Substances: Placement of CUMYL-PEGACLONE in Schedule I

- Schedules of Controlled Substances: Placement of Diphenidine in Schedule I

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Continue exploring the evidence

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Detailed coverage of the DEA’s Schedule I placement of the synthetic cannabinoid CUMYL-PEGACLONE and its clinical implications.

[Read More](https://cedclinic.com/cumyl-pegaclone-schedule-i-placement-dea-synthetic-cannabinoid/)

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An update on the DEA’s control measures for four synthetic cannabinoids classified under Schedule I.

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[Policy Watch: 20 Regulatory Updates — June 02, 2026](https://cedclinic.com/schedules-controlled-substances-placement-june-02-2026/)

Previous regulatory updates including synthetic cannabinoids and controlled substances relevant to June 2026.

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### Related

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### Verification & Medical Governance

- **Lead Clinical Author:** Benjamin Caplan, MD
- **Credentials:** Board Certified in Family Medicine (ABFM), Former CMO Canna Care Docs (250,000+ patients supervised), Founder & CMO CED Clinic & CED Foundation, Author of *The Doctor-Approved Cannabis Handbook* (Penguin Random House).
- **Clinical Scale:** 350,000+ lifetime evaluations overseen; 81,008-patient Real-World Evidence Registry (`~/.ced_rwe_vault.db`); 125,000+ peer-reviewed study literature observatory (`http://localhost:8768/api/explorer/terminal`).
- **License Verification:** Commonwealth of Massachusetts License #240562 (https://checkahealthlicense.mass.gov/).
- **NPI Registry:** 1962722637 (https://npiregistry.cms.hhs.gov/provider-view/1962722637).
- **Ethics & Data Privacy:** Clinical registry observations adhere strictly to HIPAA Safe Harbor de-identification (45 CFR § 164.514(b)) and criteria for secondary research exemption under 45 CFR § 46.104(d)(4).