Repeated Cannabis Administration on Experimental Pain and Abuse Liability

  • STATUS
    Recruiting
  • End date
    Dec 31, 2025
  • participants needed
    16
  • sponsor
    New York State Psychiatric Institute
Updated on 21 June 2021
opioid
chronic pain
hyperalgesia

Summary

Chronic pain is a significant public health concern in the U.S., for which prescription opioids have historically been the standard treatment. This has resulted in striking rates of opioid use disorders and fatal overdoses. Identifying non-opioid medications for the management of chronic pain with minimal abuse liability is a public health necessity, and cannabinoids are a promising drug class for this purpose. More than 80% of medicinal cannabis users report pain as their primary medical indication. These patients tend to seek products that are low in delta-9-tetrahydrocannabinol (THC; the primary psychoactive, and thus intoxicating, component of cannabis), and high in cannabidiol (CBD), a cannabinoid that purportedly has therapeutic benefit for pain but does not produce intoxicating effects [1]. However, there are few well-controlled human laboratory studies assessing the efficacy of high-CBD cannabis for pain in the context of abuse, and even less is known regarding the effects of daily repeated use of cannabis on pain and its relationship to abuse liability.

The proposed randomized, within-subjects, placebo-controlled 16-day crossover inpatient human laboratory pilot study (N = 16 healthy cannabis users; 8 men, 8 women) will address important gaps in our understanding of the potential therapeutic utility of cannabis for pain: 1) If repeated cannabis use can result in hyperalgesia; 2) If tolerance to the analgesic and abuse-related effects of cannabis develops and is reversible. Two distinct modalities of experimental pain will be assessed: The Cold Pressor Test (CPT) and Quantitative Sensory Testing Thermal Temporal Summation (QST-TTS), and participants will smoke cannabis 3x/day. Throughout the study, experimental pain and abuse-related effects will be assessed, as will sleep and subjective mood assessments.

Details
Condition Hyperalgesia, Immunosuppression, Drug Tolerance, Pain, Acute Pain Service, Marijuana, Cannabis Dependence, immune tolerance, immunological tolerance, ache
Treatment Cannabis
Clinical Study IdentifierNCT04576507
SponsorNew York State Psychiatric Institute
Last Modified on21 June 2021

Eligibility

Yes No Not Sure

Inclusion Criteria

Males/non-pregnant females, 21-60 years old
Current cannabis user
Able to perform all study procedures

Exclusion Criteria

Use of other illicit drugs
If medical history, physical and psychiatric examination, or laboratory tests performed during the screening process reveal any significant illness that the study physician deems contraindicated for study participation
Insensitivity to the cold-water stimulus of the Cold Pressor Test or the heat stimulus of Quantitative Sensory Testing
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