THC and Alcohol Withdrawal: Convulsion Scores and Startle Thresholds Gave Different Answers
A cannabinoid can appear to worsen one alcohol-withdrawal measure while improving another. A historical review describes this divergence between handling-induced convulsion scores and electrical startle thresholds in mice.
Two tests measured different responses
Pava and Woodward describe early experiments in which THC increased handling-induced convulsion scores after chronic alcohol exposure. Another comparison found that THC or nabilone ameliorated the reduced electrical startle threshold associated with withdrawal. These were animal behavioral endpoints, not clinical ratings in patients.
The scoring method could contribute
The reviewers identify a possible confound: acute CB1 agonists can generate hyper-reflexive responses when an animal is perturbed. Such responses could influence handling-based scores. This is an alternative explanation to investigate, not proof that the reported convulsion findings were artifacts.
Report the endpoint before the conclusion
Describing the treatment simply as improving or worsening withdrawal would conceal the disagreement. The drug, exposure regimen, test and observation period belong with each result. Neither measure establishes that cannabis safely treats human alcohol withdrawal; the experiments clarify why different scoring methods can support different interpretations.
Related reading: Alcohol–Endocannabinoid Reviews Need to Keep Stages of Dependence Separate.
Research cited
Pava MJ, Woodward JJ. A Review of the Interactions between Alcohol and the Endocannabinoid System: Implications for Alcohol Dependence and Future Directions for Research (2012). The experiments discussed here are described through this supplied review.
