A Randomized Controlled Trial to Investigate Possible Drug-drug Interactions Between Clobazam and Cannabidiol

GWP42003-P was an oral solution containing 25 mg/mL cannabidiol (CBD) or 100 mg/mL CBD dissolved in the excipients sesame oil and anhydrous ethanol (79 mg/mL) with added sweetener (0.5 mg/mL sucralose) and strawberry flavoring (0.2 mg/mL).

Placebo oral solution contained the excipients sesame oil and anhydrous ethanol (79 mg/mL) with added sweetener (0.5 mg/mL sucralose) and strawberry flavoring (0.2 mg/mL).

Participants were already on a stable dose of CLB at Baseline and continued to take a stable dose of CLB for the duration of the blinded phase of the study. CLB was administered either once or twice daily in line with the physician's preferred dosing regimen for the CLB for each participant.