Cannabidiol (CBD) has been approved as a treatment for rare childhood epilepsies and could be an effective treatment for psychotic disorders, anxiety disorders and addictions. It is available as an oral liquid and as standard oral capsules. The bioavailability of oral cannabidiol is poor (only around 5-10% is absorbed), particularly in the fasted state. With food, its absorption is much higher. In one study, a high-fat breakfast increased the maximum plasma concentration by 4-5 times. As a result of this food effect, when prescribing standard oral formulations of CBD, clinicians should provide advice on dosing the drug according to mealtimes, otherwise, there may be an increased risk of side effects or limited effectiveness. One way to reduce the food effect and improve bioavailability is to use lipid excipients. In the present study, the investigators will evaluate CBD at the dose that is effective in patients with chronic psychosis (1000mg). The novel formulation will use lipids that are all EU pharmacopoeia approved and have been used in medicinal products before. The study aims to assess whether a novel lipid formulation can increase the bioavailability of oral CBD in the fasting state.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
QUADRUPLE
Enrollment
14
Cannabidiol 1000mg standard formulation, single dose, oral
Cannabidiol 1000mg with lipid matrix, single dose, oral
King's College London
London, United Kingdom
Total Drug Exposure. (Area Under the Curve to Infinity [AUC(Inf)]
Difference in AUC(inf) for a single dose of oral CBD between the novel and standard formulations in the fasting state.
Time frame: 0 - 48 hours
Cmax
Maximum plasma concentration
Time frame: 0 - 48 hours
Tmax
Time after administration of drug when maximum plasma concentration is reached
Time frame: 0 - 48 hours
Plasma Half-life (t½)
Half-life
Time frame: 0 - 48 hours
48 Hour Drug Exposure (AUC0-48)
Area under the concentration-time curve from time zero to 48hours
Time frame: 0 - 48 hours
Gastrointestinal Symptom Rating Scale (GSRS) - Total Score
The GSRS was used to assess gastrointestinal symptoms over the past 24 hours only. It is a 15-item rating scale, where each item is assessed with a 7-point Likert scale, scored from 1 to 7, and with higher scores indicating more severe symptoms. The total score is the mean score across items (minimum score=1; maximum sore=7).
Time frame: The scale will be used pre-dose and at 24 and 48 hours post dose.
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