, Volume 211, Issue 2, pp 233–244 | Cite as

Effects of baclofen and mirtazapine on a laboratory model of marijuana withdrawal and relapse

  • Margaret HaneyEmail author
  • Carl L. Hart
  • Suzanne K. Vosburg
  • Sandra D. Comer
  • Stephanie Collins Reed
  • Ziva D. Cooper
  • Richard W. Foltin
Original investigation



Only a small percentage of individuals seeking treatment for their marijuana use achieves sustained abstinence, suggesting more treatment options are needed.


We investigated the effects of baclofen (study 1) and mirtazapine (study 2) in a human laboratory model of marijuana intoxication, withdrawal, and relapse.


In study 1, daily marijuana smokers (n = 10), averaging 9.4 (±3.9) marijuana cigarettes/day, were maintained on placebo and each baclofen dose (60, 90 mg/day) for 16 days. In study 2, daily marijuana smokers (n = 11), averaging 11.9 (±5.3) marijuana cigarettes/day, were maintained on placebo and mirtazapine (30 mg/day) for 14 days each. Medication administration began outpatient prior to each 8-day inpatient phase. On the first inpatient day of each medication condition, participants smoked active marijuana (study 1: 3.3% THC; study 2: 6.2% THC). For the next 3 days, they could self-administer placebo marijuana (abstinence phase), followed by 4 days in which they could self-administer active marijuana (relapse phase); participants paid for self-administered marijuana using study earnings.


In study 1, during active marijuana smoking, baclofen dose-dependently decreased craving for tobacco and marijuana, but had little effect on mood during abstinence and did not decrease relapse. Baclofen also worsened cognitive performance regardless of marijuana condition. In study 2, mirtazapine improved sleep during abstinence, and robustly increased food intake, but had no effect on withdrawal symptoms and did not decrease marijuana relapse.


Overall, this human laboratory study did not find evidence to suggest that either baclofen or mirtazapine showed promise for the potential treatment of marijuana dependence.


Withdrawal Treatment Cannabinoids GABA receptor Antidepressant Self-administration 



The U.S. National Institute on Drug Abuse (NIDA) supported this research (DA19239, DA09236) supplied the marijuana cigarettes. The authors have no conflicts of interest. We are grateful to Brooke Roe, Diana Paksarian, Michael Rubin, Danielle Lion, and Matthew Pecht for their superb assistance in data collection.


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Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • Margaret Haney
    • 1
    Email author
  • Carl L. Hart
    • 1
  • Suzanne K. Vosburg
    • 1
  • Sandra D. Comer
    • 1
  • Stephanie Collins Reed
    • 1
  • Ziva D. Cooper
    • 1
  • Richard W. Foltin
    • 1
  1. 1.Department of Psychiatry, Division on Substance AbuseNew York State Psychiatric InstituteNew YorkUSA

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