for people ages 1 year and up (full criteria)
study started
estimated completion



This study will monitor for potential chronic liver injury and liver fibrosis, in participants treated with cannabidiol oral solution.

Official Title

A Long-term Safety Study to Assess the Potential for Chronic Liver Injury in Participants Treated With Epidiolex (Cannabidiol) Oral Solution


Lennox Gastaut Syndrome Dravet Syndrome Tuberous Sclerosis Complex Liver injury Liver fibrosis Epidiolex Cannabidiol Tuberous Sclerosis Epilepsies, Myoclonic Syndrome


You can join if…

Open to people ages 1 year and up

  • Participant is within the approved age range as per labeling recommendations.
  • Participant is either on existing Epidiolex therapy for treatment of a seizure disorder or is to be started on Epidiolex for treatment of an Food and Drug Administration (FDA)-approved indication.
  • Participant is willing to refrain from strenuous exercise 48 to 72 hours prior to all study visits with the exception of unscheduled visits.
  • Any non-pharmacological therapies (e.g., ketogenic diet) must also be stable up to 4 weeks prior to Screening Visit and expected to be stable throughout the duration of the study.

You CAN'T join if...

  • Participant is currently using or within 3 months of screening has used recreational or medicinal cannabis, or synthetic cannabinoid-based medications, not including Epidiolex if currently prescribed.
  • Participant is not planning to abstain from using recreational cannabinoids or medicinal cannabis, or synthetic cannabinoid-based medications during the study.
  • Female participant is pregnant (positive pregnancy test), lactating or planning pregnancy during the course of the study and for 3 months thereafter.
  • Participant has any other significant disease or disorder which, in the opinion of the investigator, may either put the participant, other participants, or site staff at risk because of participation in the study, may influence the result of the study, or may affect the participant's ability to take part in the study
  • Participant has diseases or disorders which are associated with known severe liver fibrosis with a FibroScan score of ≥ 6.5 Kilopascals.
  • Positive serology panel (including hepatitis B surface antigen and hepatitis C virus antibody) and/or positive human immunodeficiency virus antibody/p24 antigen screens at screening.
  • Following a physical examination, if the participant has any abnormalities that, in the opinion of the investigator, would prevent the participant from safe participation in the study.
  • Participant has significantly impaired hepatic function at Screening Visit alanine aminotransferase or aminotransferase > 3 x upper limit of normal (ULN), and total bilirubin > 2 x ULN or international normalized ratio > 1.5.
  • Participant is planning to have epilepsy surgery or other major surgery within five years.
  • Participant has or plans to have any medical device implanted that is contraindicated for use with FibroScan, with the investigator consulting with the Sponsor as needed.
  • Participation in any clinical trial involving an investigational medicinal product within 3 months prior to the Screening Visit or at any point during this study.


  • Clinical Trial Site not yet accepting patients
    Los Angeles California 90095-1752 United States
  • Clinical Trial Site not yet accepting patients
    Sacramento California 95817 United States


accepting new patients
Start Date
Completion Date
GW Research Ltd
Phase 4
Study Type
Last Updated