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Observational Study of THC Concentrations in Acute Cannabis-induced CNS Depression

Multi-center Observational Study of Plasma Concentrations of THC and Its Metabolites in Pediatric Patients Visiting Emergency Departments for Acute Cannabis-induced CNS Depression

Status
Recruiting
Phases
Unknown
Study type
Observational
Source
ClinicalTrials.gov
Registry ID
NCT06017622
Enrollment
36
Registered
2023-08-30
Start date
2023-06-01
Completion date
2026-12-30
Last updated
2026-07-30

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Acute Cannabis-induced CNS Depression

Brief summary

This observational study is being conducted to determine plasma concentrations of tetrahydrocannabinol (THC) and its metabolites, 11-OH-THC and THC-COOH, in plasma of pediatric patients who visit the emergency department due to acute cannabis-induced CNS depression.

Detailed description

This is a multi-center, prospective, cross-sectional observational study to determine the concentrations of tetrahydrocannabinol (THC) and its metabolites (and/or other cannabinoids) in the plasma of pediatric patients admitted to emergency departments with acute cannabis-induced CNS depression. .The study will explore the relationships between these concentrations and parameters such as demographics, symptom severity, time to symptom resolution, and clinical outcomes. Samples will be collected as part of standard clinical procedure without requiring study participants to spend additional time in the hospital.

Interventions

None listed

Sponsors

Anebulo Pharmaceuticals
Lead SponsorINDUSTRY

Study design

Observational model
COHORT
Time perspective
PROSPECTIVE

Eligibility

Sex/Gender
ALL
Healthy volunteers
No

Inclusion criteria

1. Inclusion Criteria:The patient is younger than 18 years old. 2. The patient visits the ED with signs and symptoms of suspected acute cannabis-induced CNS depression, as evidenced by the patient suffering from clinically significant CNS depression combined with the following criteria: a) Exposure to cannabis or cannabis-derived products, or other products containing any CB1 agonist (such as Δ8-THC, HHC) within the last 12 hours, confirmed through one or more of the following: i. Positive toxicology testing, or ii. Other clinical evidence, such as reliable collateral history (e.g., from caregivers, EMS personnel, or witnesses), physical evidence (e.g., product packaging), or a consistent self-report. AND EITHER b) Symptoms are associated with cannabis exposure and developed during, or shortly after, cannabis exposure; OR c) In the judgment of investigator or designated clinician, the presentation includes symptoms consistent with acute cannabis-induced CNS depression (e.g. respiratory rate depression, increased sedative effects). 3. Blood samples are taken as part of routine clinical procedures, or the patient has an IV line through which blood can be taken. 4. The LAR is willing and able to provide consent. 5. The patient is willing and able to provide assent, if applicable and feasible, based on age and clinical condition.

Exclusion criteria

A potential patient who meets any of the following criteria will be excluded from participation in this study: 1. Anything that, in the opinion of the PI, would place the patient at increased risk or preclude the patient's compliance with or completion of the study. 2. Patient is presenting with signs or symptoms that are better explained by another medical condition or mental disorder, exposure to a drug other than cannabis, and, at the PI's discretion, are not induced by acute cannabis exposure. 3. Patient presenting with cannabis use disorder (CUD), cannabis hyperemesis syndrome (CHS) or cannabis withdrawal syndrome (CWS) 4. Patients who are brought in by law enforcement, i.e., cannabis intoxication associated with a vehicle accident (driving under the influence).

Design outcomes

Primary

MeasureTime frameDescription
Plasma Concentration of delta-9 tetrahydrocannabinol (THC)Day 1Concentration of THC and THC metabolites (11-OH-THC and THC-COOH) in plasma of subjects admitted to emergency departments due to acute cannabis induced CNS depression.

Secondary

MeasureTime frameDescription
DemographicsBaselineDescribe the demographics of patients with acute cannabis-induced CNS depression
Cannabis ExposureBaselineDose of cannabis ingested
Cannabis-Related SymptomsBaseline, 30 minutes, 1 hour, 6 hoursClinical symptoms resulting from cannabis exposure
Richmond Agitation and Sedation (RASS) ScoreBaseline, 30 minutes, 1 hour, 6 hoursThe RASS evaluates a patient's level of agitation or sedation on a 10-point scale ranging from +4 (combative) to -5 (unarousable) with zero representing a calm, alert state
Glasgow Coma Scale (GCS) ScoreBaseline, 30 minutes, 1 hour, 6 hoursThe GCS assesses a patient's level of consciousness based on eye opening, verbal response, and motor response. The total score ranges from 3 (deep unconsciousness to 15 (fully alert)
Caregiver Global Impression of Change (CaGI-C)Baseline, 6 hoursThe CaGI-C is completed by the caregiver or legally authorized representative and captures their overall impression of how the child's condition has changed since arrival at the emergency department. It will be measured using a 7-point Likert scale ranging from 1 (very much improved) to 7 (very much worse)
Hospital or Intensive Care Unit AdmissionFrom Enrollment Through Time of Discharge, up to 24 hoursThis assesses whether the subject was admitted to the hospital or intensive care unit. It is a binary measure and can be yes or no.
Time to DischargeFrom Enrollment Through Time of Discharge, up to 24 hoursThis assesses the time from arrival at the emergency department until the subject is released. It is measured in minutes.
Need for Positive Pressure VentilationFrom Enrollment Through Time of Discharge, up to 24 hoursThis is a binary assessment (yes or no) and captures whether the subject required ventilation assistance due to the cannabinoid exposure.
Occurrence of Seizures Requiring InterventionFrom Enrollment Through Time of Discharge, up to 24 hoursThis is a binary assessment (yes or no) and captures whether the subject experienced seizures which required intervention during the visit to the emergency department.

Countries

United States

Contacts

CONTACTLinda Klumpers, PhD
linda@anebulo.com512-598-0931
CONTACTKen Cundy, PhD
ken@anebulo.com512-598-0931
STUDY_DIRECTORKen Cundy, PhD

Anebulo Pharmaceuticals Inc.

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Jul 31, 2026