Vaporized Cannabis for Chronic Pain Associated With Sickle Cell Disease (Cannabis-SCD)
Our primary objective is to assess whether inhaling vaporized cannabis ameliorates chronic pain in patients with sickle cell disease (SCD). As these patients will all be on chronic opioid analgesics, the investigators will also assess the possible synergistic affect between inhaled cannabis and opioids. The investigators will also assess the clinical safety of the concomitant use of cannabinoids and these opioids in patients with SCD by monitoring the short-term side effects associated with combined therapy. Finally, the investigators will evaluate the short-term effects of inhaled cannabis on markers of inflammation and disease progression in patients with SCD.
Hypotheses are as follows:
- Inhaled cannabis will significantly reduce chronic pain in patients with SCD.
- Inhaled cannabis will significantly alter the short-term side effects experienced by patients who take opioids for SCD.
- Inhaled cannabis will significantly alter markers of inflammation and disease progression in patients with SCD compared to placebo.
|Study Design:||Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Crossover Assignment
Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
|Official Title:||A Randomized Crossover Proof-of-Principle Study of Cannabis for Treatment of Chronic Pain in Opioid-Dependent Patients With Sickle Cell Disease|
- pain level [ Time Frame: Days 1 and 5 of two 5-day study periods ] [ Designated as safety issue: No ]Subjects will complete a 5-day pain diary prior to admission to the Clinical Research Center (CRC) to establish a baseline of pain. They will then be assigned to inhale either vaporized cannabis of mixed THC/CBD content (4.7% THC/5.1% CBD) or placebo cannabis (0% THC/0% CBD). Participants and personnel will be blinded as to assignment. Pain will be evaluated during the 5-day inpatient exposure. Participants will be asked to participate in two such 5-day sessions separated by at least a 2-week washout so that each will be exposed to the two experimental conditions.
|Estimated Study Completion Date:||March 2016|
|Estimated Primary Completion Date:||March 2016 (Final data collection date for primary outcome measure)|
Contents of 1 cannabis cigarette (4.7% THC/5.1% CBD) will be vaporized and inhaled at 12pm on Day 1; 8am, 2pm and 8pm on Days 2-4; and 8am on Day 5.
Other Name: marijuana
Placebo Comparator: Placebo
Contents of 1 placebo cigarette (0% THC/0% CBD) will be vaporized and inhaled at 12pm on Day 1; 8am, 2pm and 8pm on Days 2-4; and 8am on Day 5.
This is a proof-of-principle investigation of the safety and potential effectiveness of inhaled vaporized cannabis when added to a stable analgesic regimen in sickle cell disease (SCD) patients with chronic pain. The study will be comprised of two 5-day intervention periods in the inpatient setting (the Clinical Research Center at SFGH), with completion of a 5-day daily pain diary prior to admission to establish an outpatient baseline. Participants will be randomly assigned, in double-blind fashion, to treatment with (A) vaporized cannabis with an approximately 1:1 ration of delta-9-tetrahydrocannabinol:cannabidiol or (B) vaporized placebo. Those who receive treatment A during the first admission will receive treatment B in the second, and those who receive treatment B during the first admission will receive treatment A in the second. The two admissions will be spaced at least 14 days apart.
On Day 1 of each admission, subjects will provide blood samples for baseline markers of inflammation and SCD disease progression. They will undergo assessments of pain, mood, and quality of life. At 12 pm on Day 1, they will inhale vaporized study agent (equivalent to 1 cannabis/placebo cigarette) using the Volcano® vaporizer; on Days 2-4 they will inhale study agent at 8 am, 2 pm, and 8 pm, and they will inhale their final dose on Day 5 at 8 am. Subjects will continue their pre-study analgesic regimen while in the study. If additional analgesia is required, supplemental therapy will be administered and the dose recorded. Pain measurements by visual analogue scale will be obtained every 2 hours while subjects are awake. On Day 5 a second set of blood samples for inflammation markers and disease progression will be obtained, and subjects will again complete pain, mood, and quality of life assessments.
|Contact: Paul Couey||415-476-4082 ext email@example.com|
|United States, California|
|San Francisco General Hospital||Not yet recruiting|
|San Francisco, California, United States, 94110|
|Principal Investigator: Donald I Abrams, MD|
|Principal Investigator:||Donald I Abrams, MD||University of California, San Francisco|