This proposal is a competing continuation of an award that significantly advanced our understanding of sleep abnormalities associated with cocaine dependence. In the initial award, rigorous studies of polysomnographically measured sleep identified a characteristic pattern of insomnia in abstinent cocaine users, with evidence for worsening sleep as abstinence progressed. The finding of impaired sleep introduced the possibility that a treatment aimed at correcting the sleep abnormality or the consequences of poor sleep might improve clinical outcomes in the treatment of cocaine dependence. The first renewal of the award tested the hypothesis that the stimulant modafinil, shown previously to be effective in reducing cocaine use in chronic users, would improve some of the consequences of poor sleep such as excessive daytime sleepiness. In addition to decreasing both objective and subjective measures of sleepiness, however, modafinil had striking and unprecedented effects on sleep architecture. Specifically, modafinil decreased latency to sleep onset, increased total sleep time, and increased slow-wave sleep time to normal levels. The current proposal aims to test the hypothesis that these improvements in sleep mediate improved clinical outcome, and so introduce sleep improvement as an essential part of the treatment of cocaine dependence. To do so, a """"""""translational trial"""""""" is proposed, where a randomized, controlled trial of modafinil is coupled with polysomnographic measurement of sleep in a relapse reduction study design. This study will directly examine the relationship between slow-wave sleep and other sleep parameters to clinical outcome, with modafinil serving as a modulator of sleep. It is hypothesized that modafinil will improve clinical outcome, and that this improvement will be significantly mediated by its effects on sleep. In addition, it is hypothesized that sleep outcomes will independently predict clinical outcome. If confirmed, these hypotheses will provide a neurophysiological explanation for the effectiveness of modafinil and contribute to the development of new treatments for stimulant dependence.

Public Health Relevance

This proposal tests the hypothesis that the improvement of sleep by modafinil in chronic cocaine users improves clinical outcome. If confirmed, this hypothesis will provide a neurophysiological explanation for the effectiveness o f modafinil and introduce sleep improvement as an essential part of the treatment of stimulant dependence.

National Institute of Health (NIH)
National Institute on Drug Abuse (NIDA)
Research Project (R01)
Project #
Application #
Study Section
AIDS Behavioral Research Subcommittee (NIDA)
Program Officer
Gordon, Harold
Project Start
Project End
Budget Start
Budget End
Support Year
Fiscal Year
Total Cost
Indirect Cost
Yale University
Schools of Medicine
New Haven
United States
Zip Code
Hodges, Sarah E; Pittman, Brian; Morgan, Peter T (2017) Sleep Perception and Misperception in Chronic Cocaine Users During Abstinence. Sleep 40:
Angarita, Gustavo A; Emadi, Nazli; Hodges, Sarah et al. (2016) Sleep abnormalities associated with alcohol, cannabis, cocaine, and opiate use: a comprehensive review. Addict Sci Clin Pract 11:9
Morgan, Peter T; Angarita, Gustavo A; Canavan, Sofija et al. (2016) Modafinil and sleep architecture in an inpatient-outpatient treatment study of cocaine dependence. Drug Alcohol Depend 160:49-56
Angarita, Gustavo A; Canavan, Sofija V; Forselius, Erica et al. (2014) Correlates of polysomnographic sleep changes in cocaine dependence: self-administration and clinical outcomes. Drug Alcohol Depend 143:173-80
Canavan, Sofija V; Forselius, Erica L; Bessette, Andrew J et al. (2014) Preliminary evidence for normalization of risk taking by modafinil in chronic cocaine users. Addict Behav 39:1057-61
Angarita, G A; Canavan, S V; Forselius, E et al. (2014) Abstinence-related changes in sleep during treatment for cocaine dependence. Drug Alcohol Depend 134:343-347
Matuskey, D; Pittman, B; Chen, J I et al. (2012) A single-day paradigm of self-regulated human cocaine administration. Pharmacol Biochem Behav 103:95-101
Pace-Schott, Edward F; Shepherd, Elizabeth; Spencer, Rebecca M C et al. (2011) Napping promotes inter-session habituation to emotional stimuli. Neurobiol Learn Mem 95:24-36
Matuskey, D; Pittman, B; Forselius, E et al. (2011) A multistudy analysis of the effects of early cocaine abstinence on sleep. Drug Alcohol Depend 115:62-6
Angarita, Gustavo A; Pittman, Brian; Gueorguieva, Ralitza et al. (2010) Regulation of cocaine self-administration in humans: lack of evidence for loading and maintenance phases. Pharmacol Biochem Behav 95:51-5

Showing the most recent 10 out of 38 publications