# DEA Synthetic Cannabinoids Schedule I Placement Updates 2026 > **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-placement-june-2026/ > **Published:** 2026-06-09T00:03:40-04:00 | **Last Modified / Clinically Audited:** 2026-09-28T10:05:22-04:00 > **Clinical Summary:** Review DEA synthetic cannabinoids schedule I placement updates impacting clinical practice and regulatory policy in 2026. Stay informed on controlled substances. --- Policy WatchJune 08, 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: Placement of Diphenidine in Schedule I](https://www.federalregister.gov/documents/2026/05/26/2026-10380/schedules-of-controlled-substances-placement-of-diphenidine-in-schedule-i) The DEA placed diphenidine, a synthetic opioid with similar effects to fentanyl, into Schedule I, meaning it has a high potential for abuse and no currently accepted medical use. [Read more →](https://www.federalregister.gov/documents/2026/05/26/2026-10380/schedules-of-controlled-substances-placement-of-diphenidine-in-schedule-i) Score 70Federal Register [Schedules of Controlled Substances: Temporary Placement of 2-Fluorodeschloroketamine in Schedule I](https://www.federalregister.gov/documents/2026/05/22/2026-10253/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 alongside or as an alternative to [cannabis-based treatments](https://cedclinic.com/cannabis-medical-clinic-experience-beyond-smoking-vaping/). [Read more →](https://www.federalregister.gov/documents/2026/05/22/2026-10253/schedules-of-controlled-substances-temporary-placement-of-2-fluorodeschloroketamine-in-schedule-i) Score 70Federal Register [Schedules of Controlled Substances: Placement of CUMYL-PEGACLONE in Schedule I](https://www.federalregister.gov/documents/2026/05/13/2026-09566/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/2026/05/13/2026-09566/schedules-of-controlled-substances-placement-of-cumyl-pegaclone-in-schedule-i) 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/2026/05/01/2026-08517/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 encountering patients using these substances. [Read more →](https://www.federalregister.gov/documents/2026/05/01/2026-08517/schedules-of-controlled-substances-placement-of-4f-mdmb-butica-adb-4en-pinaca-5f-edmb-pica-and) 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 accepted medical use, impacting clinicians encountering 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 cannabis patients presenting with altered mental states. [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 encountering these substances in patient assessments. [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, making it illegal and impacting patient safety and clinician practices. [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, impacting clinicians assessing patient substance use. [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 through potential cross-contamination of unregulated products and increased caution regarding substance identification. [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 federal rule temporarily places seven fentanyl-related substances in Schedule I, potentially impacting access for research or clinical use should cannabis clinicians consider fentanyl analogs for pain management. [Read more →](https://www.federalregister.gov/documents/2025/09/18/2025-18103/schedules-of-controlled-substances-placement-of-seven-specific-fentanyl-related-substances-in) Digest-Level Clinical Commentary Dr. Caplan’s Take Clinical Reflection on DEA Scheduling Actions Looking at this digest, I note that only item 5 directly addresses cannabis policy—the proposed rescheduling of FDA-approved cannabis products from Schedule I to Schedule III—while the remaining 19 items concern synthetic cannabinoids and other novel psychoactive substances, signaling the DEA’s continued focus on controlling designer drugs rather than reshaping cannabis regulation itself. This disconnect underscores that federal [cannabis medicine](https://cedclinic.com/essential-oils-industrial-hemp-antimicrobial-benefits/) practice remains constrained by Schedule I status despite growing clinical evidence for cannabinoid efficacy in specific conditions, meaning my ability to prescribe or recommend cannabis is still limited to states with [medical cannabis](https://cedclinic.com/therapeutic-benefits-of-thc/) laws, while the DEA expends considerable resources scheduling novel analogues that patients may turn to in cannabis’s absence. The regulatory landscape suggests a gradual, legalistic shift toward rescheduling cannabis-derived medications Clinical Perspective The majority of these regulatory actions reflect the DEA’s ongoing efforts to control synthetic drugs of abuse that emerge faster than formal scheduling can accommodate them, including novel cannabinoids, benzodiazepines, opioids, and dissociatives. Item 5 stands out as the sole action addressing legitimate medical use, rescheduling FDA-approved cannabis products from Schedule I to Schedule III to align regulatory status with clinical reality. Clinicians should recognize that most of these placements represent [public health](https://cedclinic.com/cannabis-mold-contamination-risks-recall-safety/) responses to drugs with minimal therapeutic value and significant abuse potential, while remaining aware that rescheduling of cannabis preparations may gradually shift how some cannabinoid-based medications are regulated and prescribed. Controlled SubstancesDrug SchedulingSynthetic DrugsRegulatory ActionFederal Policy 💬 Join the Conversation Have a question about how this applies to your situation? [Ask Dr. Caplan →](https://benjamincaplan.com/ask-dr-caplan) Want to discuss this topic with other patients and caregivers? [Join the forum discussion →](https://cedclinic.com/interact/discussion-forums/forum/ask-dr-caplan/) Have thoughts on this? Share it: [𝕏 Share on X](https://twitter.com/intent/tweet?text=Just+read+this+on+CEDclinic.com%3A+Policy+Watch+%E2%80%94+June+08%2C+2026+%40drcaplan&url=)[in Share on LinkedIn](https://www.linkedin.com/sharing/share-offsite/?url=)[🦅 Share on BlueSky](https://bsky.app/intent/compose?text=Just+read+this%3A+Policy+Watch+%E2%80%94+June+08%2C+2026+--+via+%40drcaplan.bsky.social+)[📷 Follow on Instagram](https://www.instagram.com/drbenjamincaplan)[📝 Read more on Substack](https://doctorapprovedcannabis.substack.com/)[🔔 Subscribe via RSS](https://cedclinic.com/feed/) Related Articles - [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://cedclinic.com/dea-rescheduling-schedule-iii-cannabis-fda-approved-products/) - Schedules of Controlled Substances: Placement of 4F-MDMB-BUTICA, ADB-4en-PINACA, 5F-EDMB-PICA, and MMB-FUBICA in Schedule I - [Schedules of Controlled Substances: Placement of CUMYL-PEGACLONE in Schedule I](https://cedclinic.com/dea-synthetic-cannabinoids-schedule-i-placement-update/) [https://cedclinic.com/contact/](https://cedclinic.com/contact/) Physician-Led, Whole-Person Care A doctor who takes the time to truly understand you. Personal care that starts with listening and is guided by experience and ingenuity. Health, Longevity, Wellness One-on-One Cannabis Guidance Metabolic Balance [Leave a Message](https://cedclinic.com/contact/) [Metabolic Care](https://cedclinic.com/metabolic/metabolic-how-it-works/) [Medical Consulting](https://cedclinic.com/book/) [Cannabis Care](https://cedclinic.com/book/) [https://cedclinic.com/contact/](https://cedclinic.com/contact/) RELATED READING AT CED CLINIC Continue exploring the evidence [Policy Watch: 20 Regulatory Updates — June 06, 2026](https://cedclinic.com/dea-synthetic-cannabinoids-schedule-i-june-2026/) Explore the latest regulatory updates from early June 2026, including controlled substances scheduling and synthetic cannabinoid developments. [Read More](https://cedclinic.com/dea-synthetic-cannabinoids-schedule-i-june-2026/) Policy Watch: 19 Regulatory Updates — June 16, 2026 Stay updated with mid-June 2026 regulatory changes affecting synthetic drugs and cannabinoid scheduling. Explore Updates [Policy Watch: 20 Regulatory Updates — June 22, 2026](https://cedclinic.com/dea-synthetic-opioids-schedule-i-placement-june-2026/) Review late June 2026 regulatory developments focusing on controlled substances and synthetic cannabinoid classifications. [Learn More](https://cedclinic.com/dea-synthetic-opioids-schedule-i-placement-june-2026/) ### Related --- ### 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).