Cannabidiol Bioavailability Trial With Oral Multiple Dose Administration

This single centre, open-label, randomised (order of treatments), balanced, multiple dose trial will be performed in a 2-period, 2-sequence-crossover design with direct switch-over. Eighteen (18) healthy subjects of both sexes (balanced distribution intended, but minimum 40% of each sex) are intended to be randomised.

The IMPs will be administered after a light meal as single oral doses of 1500 mg cannabidiol (i.e. 5.051 g granules of Test to be dispersed in water or 15 ml solution of Reference) twice daily (i.e. every 12 h) over 7 consecutive days.

Blood sampling will be performed after the 13th administration over 24 h, thereby including the 14th administration, in order to characterise pharmacokinetic parameters after multiple dosing over a whole day interval.

Comparison of maximum systemic exposure of Test vs. Reference will be performed under steady state conditions by means of AUC144-168,ss, Cmax,144-168,ss, and Cmin,144-168,ss of CBD and 7-OH-CBD.

The clinical trial will be performed as a cross-over investigation with intra-individual comparison, thus reducing variability of the pharmacokinetic parameters, which is supposed to be higher between subjects than within an individual subject.

Inclusion criteria

• ethnic origin: Caucasian
• age: 18 years or older (including)
• body-mass index (BMI): >= 18.5 kg/m² and <= 30.0 kg/m²
• good state of health
• non-smoker or ex-smoker for at least 1 month
• written informed consent, after having been informed about benefits and potential risks of the clinical trial, as well as details of the insurance taken out to cover the subjects participating in the clinical trial

Exclusion criteria

Safety concerns

• existing cardiac and/or haematological diseases or pathological findings, which might interfere with the safety or tolerability of the active ingredient
• existing hepatic and/or renal diseases or pathological findings, which might interfere with the safety or tolerability, and/or pharmacokinetics of the active ingredient
• existing gastrointestinal diseases or pathological findings, which might interfere with the safety, tolerability, absorption and/or pharmacokinetics of the active ingredient
• history of relevant CNS and/or psychiatric disorders and/or currently treated CNS and/or psychiatric disorders
• hepatic impairment
• history of bradycardia, tachycardia or other arrhythmic symptoms of clinical significance
• Nurses Global Assessment of Suicide Risk (NGASR)-scale showing a high or very high risk
• known allergic reactions to the active ingredients used or to constituents of the pharmaceutical preparations
• history of severe allergies or multiple drug allergies unless it is judged as not relevant for the clinical trial by the investigator
• systolic blood pressure < 90 or > 139 mmHg
• diastolic blood pressure < 60 or > 89 mmHg
• heart rate < 50 bpm or > 90 bpm
• QTc interval > 450 ms for men and > 470 ms for women
• ASAT > 20% ULN, ALAT > 10% ULN, bilirubin > 20% ULN (except in case of existing Morbus Gilbert-Meulengracht deduced from anamnesis/medical history) and creatinine > 0.1 mg/dL ULN (limit of > 0.1 mg/dL correspondents to of > 9 µmol/l ULN)
• all other laboratory values out of normal range unless the deviation from normal is judged as not relevant for the clinical trial by the investigator
• positive anti-HIV-test (if positive to be verified by western blot), HBs-AG-test or anti-HCV-test
• diagnosis of COVID-19 within the last 14 days prior to individual enrolment of the subject
• contact to persons in foreign risk regions as defined by the Robert Koch Institute within the last 14 days prior to individual enrolment of the subject
• known direct contact with insufficient protection to persons with diagnosis of COVID-19 within the last 14 days prior to individual enrolment upon reporting of the subject

Lack of suitability for the clinical trial

• acute or chronic diseases which may interfere with the pharmacokinetics of the IMP
• history of or current drug or alcohol dependence
• positive alcohol, cotinine or drug test at screening examination
• regular intake of alcoholic food or beverages of ≥ 24 g pure ethanol for male or ≥ 12 g pure ethanol for female per day
• subjects who are on a diet which could affect the pharmacokinetics of the active ingredient
• regular intake of caffeine containing food or beverages of ≥ 500 mg caffeine per day
• blood donation or other blood loss of more than 400 ml within the last 2 months prior to individual enrolment of the subject
• administration of any investigational medicinal product during the last 2 months prior to individual enrolment of the subject
• regular treatment with any systemically available medication (except hormonal contraceptives and hormonal replacement therapy, e.g. estrogens, L-thyroxine)
• subjects, who report a frequent occurrence of migraine attacks

For female subjects with childbearing potential only:

• positive pregnancy test at screening examination
• pregnant or lactating women
• female subjects who do not agree to apply highly effective contraceptive methods

Administrative reasons

• subjects suspected or known not to follow instructions
• subjects who are unable to understand the written and verbal instructions, in particular regarding the risks and inconveniences they will be exposed to during their participation in the clinical trial