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for people ages 2–30 (full criteria)
study started
estimated completion:
Maria Roberta Cilio



This Phase 3 trial will enroll participants diagnosed with Lennox-Gastaut Syndrome (LGS) who are still experiencing at least 4 motor seizures involving the trunk or extremities per week, despite ongoing treatment with up to 3 antiepileptic drugs (AEDs) and who meet inclusion/exclusion criteria. Following a 28-day baseline period, participants will begin an 84-day treatment period. Participants will be assigned to receive twice daily doses of placebo or cannabidiol oral solution at the highest dose determined to be safe in a previous trial. Following study completion, all participants will be invited to receive Cannabidiol Oral Solution in an open label extension study (under a separate protocol).

Official Title

A Multicenter, Randomized, Double-blind, Placebo-controlled, Interventional Study to Assess the Safety and Efficacy of Pharmaceutical Cannabidiol Oral Solution as an Adjunctive Therapy for Treatment of Subjects With Inadequately Controlled Lennox-Gastaut Syndrome


Lennox-Gastaut Syndrome Treatment-resistant seizures Pharmaceutical Solutions


You can join if…

Open to people ages 2–30

  • Meets protocol-specified criteria for qualification and contraception, including clinical diagnosis of refractory LGS and onset of seizures according to protocol-specified criteria
  • Is able to speak and understand the language in which the study is being conducted, is able to understand the procedures and study requirements and has voluntarily signed and dated an informed consent form approved by the Institutional Review Board before the conduct of any study procedure
  • In the opinion of the Investigator, the participants and parent(s)/caregiver(s) are willing and able to comply with the study procedures and visit schedules, including venipuncture, twice daily dosing, accurate diaries, and the Follow-up Visits (if applicable).

You CAN'T join if...

  • Medical history is outside protocol-specified parameters
  • Clinically significant history of allergic reactions or significant sensitivities to cannabinoids or to any of the other ingredients in the study drug
  • Inadequate supervision by parents or guardians
  • History or current use of dietary supplements, drugs or over-the counter medications outside protocol-specified parameters
  • Signs, symptoms or history of any condition that, per protocol or in the opinion of the investigator, might compromise: 1) the safety or well-being of the participant or study staff; 2) the safety or well-being of the participant's offspring (such as through pregnancy or breast-feeding); 3) the analysis of results


not yet accepting patients
Start Date
Completion Date
INSYS Therapeutics Inc
Phase 3
Lead Scientist
Maria Roberta Cilio
Study Type
Last Updated
August 1, 2017
I’m interested in this study!