A double blind, randomised, placebo controlled parallel group study of cannabis based medicine extract (CBME), in the treatment of peripheral neuropathic pain characterised by allodynia
ISRCTN | ISRCTN38250575 |
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DOI | https://doi.org/10.1186/ISRCTN38250575 |
ClinicalTrials.gov number | NCT00711880 |
Secondary identifying numbers | GWNP0101 |
- Submission date
- 14/11/2005
- Registration date
- 18/11/2005
- Last edited
- 26/09/2019
- Recruitment status
- No longer recruiting
- Overall study status
- Completed
- Condition category
- Signs and Symptoms
Prospectively registered
Protocol
Statistical analysis plan
Results
Individual participant data
Plain English Summary
Not provided at time of registration
Contact information
Dr Stephen Wright
Scientific
Scientific
GW Pharma Ltd
Porton Down Science Park
Salisbury
SP4 0JQ
United Kingdom
Study information
Study design | Double-blind randomised placebo-controlled parallel-group trial |
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Primary study design | Interventional |
Secondary study design | Randomised controlled trial |
Study setting(s) | Not specified |
Study type | Treatment |
Participant information sheet | Not available in web format, please use contact details to request a participant information sheet |
Scientific title | A double blind, randomised, placebo controlled parallel group study of cannabis based medicine extract (CBME), in the treatment of peripheral neuropathic pain characterised by allodynia |
Study acronym | GWNP0101 |
Study hypothesis | Tetrahydrocannabinol (THC):cannabidiol (CBD), 1:1 relieves peripheral neuropathic pain characterised by allodynia. |
Ethics approval(s) | Ethics approval received from the local medical ethics committee |
Condition | Peripheral neuropathic pain, characterised by allodynia |
Intervention | THC:CBD, 1:1 and placebo |
Intervention type | Drug |
Pharmaceutical study type(s) | |
Phase | Not Applicable |
Drug / device / biological / vaccine name(s) | Tetrahydrocannabinol (THC), cannabidiol (CBD) |
Primary outcome measure | Efficacy in relieving peripheral neuropathic pain after 5 weeks of treatment |
Secondary outcome measures | 1. Qualitative aspects of pain as reported the Neuropathic Pain Scale (NPS) 2. The physical and psychological effects of pain using measures of sleep disturbance, the Pain Disability Index (PDI) and General Health Questionnaire (GHQ-12) 3. Patients cognitive function using the Brief Repeatable Battery of Neuropsychological tests (BRB-N) 4. Patient perception of change in allodynia and pain on movement after 5 weeks of treatment 5. Tolerability of CBME using the adverse event profile, electrocardiogram (ECG), clinical laboratory tests and vital signs |
Overall study start date | 13/05/2002 |
Overall study end date | 03/03/2004 |
Eligibility
Participant type(s) | Patient |
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Age group | Adult |
Lower age limit | 18 Years |
Sex | Both |
Target number of participants | 80 |
Total final enrolment | 145 |
Participant inclusion criteria | 1. Patient or legal representative is willing and able to give informed consent for participation in the study (if the patient is unable to read or to sign the document, consent procedures as detailed in the Declaration of Helsinki must be followed) 2. Male or Female, aged 18 years or above 3. Chronic peripheral neuropathic pain of at least 6 months duration 4. Presence of mechanical allodynia within the territory of the affected nerve(s) 5. Evidence of sensory change in the affected nerve by simple clinical tests 6. Pain with a severity score of 4 or more on at least 4 completed BS-11 scores in the baseline week 7. Stable dose of current analgesic medication for at least 2 weeks prior to study entry 8. Female patients of child bearing potential and male patients whose partner is of child bearing potential are willing to ensure that they or their partner use effective contraception during the study and for 3 months thereafter 9. Willing for his or her names to be notified to the Home Office for participation in this study 10. Willing to allow his or her General Practitioner and Consultant, if appropriate, to be notified of participation in the study 11. No cannabinoid use (cannabis, Marinolâ or Nabilone) at least 7 days before Visit 1 and willing to abstain from any use of cannabis during the study 12. Able (in the Investigators opinion), and willing to comply with all study requirements |
Participant exclusion criteria | 1. History of schizophrenia, other psychotic illness, severe personality disorder or other significant psychiatric disorder other than depression associated with their underlying condition 2. Concomitant severe non-neuropathic pain or the presence of cancer related neuropathic pain or neuropathic pain resulting from diabetes mellitus 3. Known history of alcohol or substance abuse 4. Severe cardiovascular disorder, such as ischaemic heart disease, arrhythmias (other than well controlled atrial fibrillation), poorly controlled hypertension or severe heart failure 5. History of epilepsy 6. Female patient who is pregnant, lactating or planning pregnancy during the course of the study 7. Male patient who is currently receiving and unwilling to stop sildenafil (Viagra®) and unwilling to stop for the duration of the study 8. Regular levodopa therapy within 7 days of study entry 9. Significant renal or hepatic impairment 10. Known or suspected hypersensitivity to cannabinoids 11. Scheduled elective surgery or other procedures requiring general anaesthesia during the study 12. Terminal illness 13. Any other significant disease or disorder which, in the opinion of the Investigator, may either put the patient at risk because of participation in the study, or may influence the result of the study, or the patients ability to participate in the study 14. Travel outside the UK planned during the study 15. Donation of blood during the study 16. Patients who have participated in another research study in the past 12 weeks 17. Patients previously randomised into this study |
Recruitment start date | 13/05/2002 |
Recruitment end date | 03/03/2004 |
Locations
Countries of recruitment
- England
- United Kingdom
Study participating centre
GW Pharma Ltd
Salisbury
SP4 0JQ
United Kingdom
SP4 0JQ
United Kingdom
Sponsor information
GW Pharma Ltd (UK)
Industry
Industry
Porton Down Science Park
Salisbury
SP4 0JQ
United Kingdom
https://ror.org/01gtctx88 |
Funders
Funder type
Industry
GW Pharma Ltd (UK)
No information available
Results and Publications
Intention to publish date | |
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Individual participant data (IPD) Intention to share | No |
IPD sharing plan summary | Not provided at time of registration |
Publication and dissemination plan | Not provided at time of registration |
IPD sharing plan |
Study outputs
Output type | Details | Date created | Date added | Peer reviewed? | Patient-facing? |
---|---|---|---|---|---|
Basic results | 26/09/2019 | No | No | ||
Results article | results | 15/12/2007 | 26/09/2019 | Yes | No |
Editorial Notes
26/09/2019: The following changes were made to the trial record:
1. Publication reference added.
2. The total final enrolment was added.
3. ClinicalTrials.gov number added.
4. Added ClinicalTrials.gov link to basic results (scientific).
12/09/2016: No publications found, verifying study status with principal investigator.