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The purpose of this study is to see if Lofexidine in combination with Marinol is superior to placebo in achieving abstinence, reducing cannabis use and reducing withdrawal in cannabis-dependent patients seeking treatment for their marijuana use.
Cannabis use disorders remain the most common illicit drug use disorder and options for treatment remain limited. Compared to other abusable substances, there has been little investigation of pharmacotherapies for cannabis dependence and no effective pharmacotherapy for cannabis dependence has yet to been developed. The development of effective cannabis dependence pharmacotherapy is an important unmet public health need. Agonist pharmacotherapy strategies have been effective for other substance use disorders (e.g., opioid and nicotine use disorders) and the endocannabinoid system represents a promising target for agonist pharmacotherapy with dronabinol. Lofexidine, a noradrenergic system suppressant, is effective in treating opioid withdrawal and shows promise as a cannabis use disorder pharmacotherapy. Haney et al. (2008) found that the combination of lofexidine and dronabinol (Lofex-Dro) was superior to placebo, lofexidine alone, or dronabinol alone in improving sleep and other cannabis withdrawal symptoms. Further, reduction in craving and relapse was greater for this combined pharmacotherapy relative to either medication alone or placebo. The proposed protocol is a 2 group, double blind, placebo-controlled outpatient study of the safety and efficacy of the combination of dronabinol and lofexidine for the treatment of cannabis dependence. We plan to enroll 180 subjects in a 12-week trial. The primary hypothesis is that dronabinol will act as an agonist treatment while lofexidine will suppress craving- and cue-induced related stress such that the combination will act in a complementary manner to induce prolonged abstinence from marijuana.
Allocation: Randomized, Control: Placebo Control, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor), Primary Purpose: Treatment
Lofexidine and Dronabinol, Placebo
New York State Psychiatric Institute
National Institute on Drug Abuse (NIDA)
Published on BioPortfolio: 2014-07-23T21:11:42-0400
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A psychoactive compound extracted from the resin of Cannabis sativa (marihuana, hashish). The isomer delta-9-tetrahydrocannabinol (THC) is considered the most active form, producing characteristic mood and perceptual changes associated with this compound.
A psychoactive compound extracted from the resin of Cannabis sativa (marihuana, hashish). The isomer delta-9-tetrahydrocannabinol (THC) is considered the most active form, producing characteristic mood and perceptual changes associated with this compound. Dronabinol is a synthetic form of delta-9-THC.
Strong dependence, both physiological and emotional, upon morphine.
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