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The study will examine how medical cannabis use affects opioid analgesic use over time, with particular attention to THC/CBD content, HIV outcomes, and severe adverse events.
Locally preserved from ClinicalTrials.govOpen ClinicalTrials.govlast source update 2023-11-08
What this record can show
This locally preserved record separates the registered protocol from source-reported registry results. Neither is a treatment recommendation.
Registry facts
The overarching goal of the study is to understand how medical cannabis use affects opioid analgesic use over time, with particular attention to THC/CBD content, HIV outcomes, and adverse events. The study will include a cohort of 250 HIV+ and HIV- adults with (a) severe or chronic pain, (b) opioid analgesic use, and (c) new certification for medical cannabis. Over 18 months, participants will have 7 in-person visits every 3 months and 39 web-based questionnaires every 2 weeks. Data sources will include questionnaires; medical, pharmacy, and Prescription Monitoring Program records; and urine and blood samples. Over each 2-week time period (unit of analysis), the primary exposure measure will be number of days of medical cannabis use, and the primary outcome measure will be cumulative opioid analgesic dose. Qualitative interviews will also be conducted with a subgroup of 30 participants to explore perceptions of how medical cannabis use affects opioid analgesic use. Qualitative findings will help understand the reasons underlying the findings of the cohort study.
Linked local records
Local links use governed condition terms or exact source-reported intervention names. They are navigation candidates, not efficacy claims.
Research network
Interventions
No structured intervention was reported.
Eligibility
Adults with chronic pain, who are taking opioids, and who are newly certified for medical marijuana in NY.
primary outcomes
Time frame: Opioid analgesic use will be a cumulative dose of all opioid analgesics over each of the 39 2-week periods.
The primary outcome will combine measures of prescribed and illicit opioid analgesic use.
secondary outcomes
Time frame: Alternative measures of opioid analgesic use will be measured over each of the 39 2-week periods.
Alternative measures of opioid analgesic use will include: number of days of all opioid analgesic use, mean daily dose of all opioid analgesics, cumulative dose of prescribed (only) opioid analgesics, number of days of prescribed (only) opioid analgesic use, and mean daily dose of prescribed (only) opioid analgesic use.
Time frame: HIV outcomes will be measured seven times every 3 months from baseline through 18 months.
HIV viral load will be measured in copies/ml from blood samples collected during the study.
Time frame: CD4 count will be measured seven times every 6 months from baseline through 18 months..
CD4 count will be measured in cells/mm3 from blood samples collected during the study.
Time frame: HIV antiretroviral adherence will be measured seven times every 3 months from baseline through 18 months..
HIV antiretroviral adherence will be a composite measure from self-reported questionnaires and pharmacy records.
Time frame: HIV risk behaviors will be measured seven times every 3 months from baseline through 18 months..
HIV risk behaviors will be a composite measure from self-reported questionnaires.
Time frame: Cannabis use disorder will be measured three times every 6 months.
Cannabis use disorder will be measured using standardized instruments.
Time frame: Illicit drug use will be measured seven times every 3 months from baseline through 18 months..
Illicit drug use will be measured using standardized surveys and urine toxicology testing.
Time frame: Diversion will be measured seven times every 3 months from baseline through 18 months..
Diversion will be measured using standardized surveys.
Time frame: Non-fatal overdose will be measured seven times every 3 months from baseline through 18 months..
Non-fatal overdose will be measured using standardized surveys.
Publications
Time frame: Death will be measured 18 months after enrollment.
Death will be ascertained from the National Death Index
Time frame: Accident/Injuries will be measured seven times every 3 months from baseline through 18 months..
Accidents/Injuries will be measured using standardized survey instruments