Cannabis Tolerance Developed Rapidly and Withdrawal Symptoms Appeared After Just One Week of Use
A review of 120 research subjects found tolerance to cannabis developed and faded quickly, while withdrawal symptoms including irritability, insomnia, and tremor appeared after as few as seven days of THC use.
Quick Facts
What This Study Found
Drawing on data from 120 research subjects, this review documented how the body adapts to repeated cannabis exposure and what happens when use stops.
Tolerance developed to multiple effects: cardiovascular changes, lowered eye pressure, sleep disruption, mood changes, and behavioral effects. This tolerance was acquired rapidly under consistent dosing and was also lost rapidly when dosing stopped. The mechanisms appeared primarily functional (the brain adapting its response) rather than metabolic (the body breaking down THC faster).
Withdrawal symptoms emerged after as little as seven days of THC administration. The syndrome included irritability, restlessness, insomnia, loss of appetite, nausea, sweating, increased salivation, elevated body temperature, tremor, weight loss, and changes in both sleep and waking brain wave patterns. While described as "mild and transient" in the 120 subjects studied, the syndrome resembled withdrawal from sedative drugs.
The review raised a clinically important concern: if tolerance develops to therapeutic effects, chronic medical use could become less effective over time.
Key Numbers
120 research subjects studied. Withdrawal appeared after as few as 7 days of THC use. Tolerance development rate depended on dose and dosing schedule.
How They Did This
Review of clinical data from 120 research subjects who received THC under controlled conditions. The review synthesized findings on tolerance acquisition and loss, withdrawal symptoms, and clinical implications.
Why This Research Matters
This review established that cannabis tolerance and withdrawal were real, measurable phenomena, countering claims in both directions: that cannabis was completely non-addictive, or that it produced severe dependence. The finding that therapeutic tolerance could undermine medical use remains relevant to modern medical cannabis prescribing.
The Bigger Picture
Published four years before dronabinol's FDA approval, this review raised questions about long-term medical cannabis use that are still being investigated today. The concept of "cannabis use disorder" recognized in modern diagnostic criteria builds partly on the withdrawal syndrome documented here.
What This Study Doesn't Tell Us
Data from controlled research settings may not reflect real-world usage patterns. The 120 subjects likely represented a relatively homogeneous population. Withdrawal was described as mild and transient, which may underestimate severity in heavier or longer-term users.
Questions This Raises
- ?How does tolerance progression in controlled settings compare to naturalistic use?
- ?Can dosing strategies minimize therapeutic tolerance?
- ?Does the withdrawal syndrome worsen with longer use periods or higher potency products?
Trust & Context
- Key Stat:
- Withdrawal symptoms appeared after as few as 7 days of THC administration
- Evidence Grade:
- A review synthesizing controlled clinical data from 120 subjects. The sample size and controlled conditions add credibility, but the review format limits detailed methodology assessment.
- Study Age:
- Published in 1981. Modern cannabis products are substantially more potent, which may affect both tolerance development and withdrawal severity.
- Original Title:
- Clinical relevance of cannabis tolerance and dependence.
- Published In:
- Journal of clinical pharmacology, 21(S1), 143S-152S (1981)
- Authors:
- Jones, R T(4), Benowitz, N L(2), Herning, R I
- Database ID:
- RTHC-00019
Evidence Hierarchy
Summarizes existing research on a topic.
What do these levels mean? →Frequently Asked Questions
What were the withdrawal symptoms?
Irritability, restlessness, insomnia, loss of appetite, nausea, sweating, increased salivation, elevated body temperature, tremor, weight loss, and changes in brain wave patterns during sleep and waking.
How quickly did tolerance develop?
Tolerance was acquired rapidly under consistent dosing and was also lost rapidly when dosing stopped. The rate depended on dose size and schedule.
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Cite This Study
https://rethinkthc.com/research/RTHC-00019APA
Jones, R T; Benowitz, N L; Herning, R I. (1981). Clinical relevance of cannabis tolerance and dependence.. Journal of clinical pharmacology, 21(S1), 143S-152S.
MLA
Jones, R T, et al. "Clinical relevance of cannabis tolerance and dependence.." Journal of clinical pharmacology, 1981.
RethinkTHC
RethinkTHC Research Database. "Clinical relevance of cannabis tolerance and dependence." RTHC-00019. Retrieved from https://rethinkthc.com/research/jones-1981-clinical-relevance-of-cannabis
Access the Original Study
Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkTHC research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.