Cocaine Overdoses Rising Especially Among African Americans

MedicalResearch.com Interview with:
“Cocaine” by Nightlife Of Revelry is licensed under CC BY 2.0Dr. Dave Thomas PhD

Health Scientist Administrator
National Institute on Drug Abuse 

MedicalResearch.com: What is the background for this study? What are the main findings?

Response: At the National Institute on Drug Abuse, we support research on all forms of drug use, and are aware that cocaine misuse is on the rise.  We are aware that various forms of drug use can have greater prevalence by race, sex, age and other population characteristics.

The main finding of this paper is that cocaine overdose rates are on the rise and that that the group hit hardest is the non-Hispanic black population.

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Overdose Deaths Increase Across Urban Status, Sex and Race Lines

MedicalResearch.com Interview with:
“Pills” by Kurtis Garbutt is licensed under CC BY 2.0
Christopher M. Jones, PharmD
Office of the Assistant Secretary for Planning and Evaluation
Office of the Secretary
U.S. Department of Health and Human Services 

MedicalResearch.com: What is the background for this study? What are the main findings?

Response: Drug overdoses are the leading cause of injury death in the United States, resulting in approximately 52,000 deaths in 2015. Although prescription drugs, in particular opioid pain relievers, were primarily responsible for the rapid expansion of this large and growing public health crisis, illicit drugs (heroin, illicit fentanyl, cocaine, and methamphetamines) now are contributing substantially to the problem. Understanding differences in illicit drug use, illicit drug use disorders, and overall drug overdose deaths in metropolitan and nonmetropolitan areas is important for informing public health programs, interventions, and policies.

We found that the prevalence of self-reported past-month use of illicit drugs increased significantly across urban status (large metropolitan, small metropolitan, and nonmetropolitan) between 2003-2005 and 2012-2014. Prevalence was higher for males than females, however, in the large metropolitan group, the percentage increase in prevalence from 2003–2005 to 2012–2014 was greater for females (23.4%) than for males (21.6%). There were notable differences by age. During 2012–2014, respondents aged 18–25 years had the highest prevalence of past-month use of illicit drugs for all urban levels. For respondents in this age group, the prevalence increased slightly from 2003–2005 to 2012–2014 in large metropolitan areas while the prevalence remained stable among small metropolitan area respondents and nonmetropolitan area respondents. Past-month use of illicit drugs declined over the study period for the youngest respondents (aged 12–17 years), with the largest decline among small metropolitan area youth.

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Recreational Cocaine Use Activates Addiction Related Brain Mechanisms Sooner Than Previously Realized

MedicalResearch.com Interview with:

Marco Leyton, Ph.D. Professor, Department of Psychiatry McGill University

Dr. Marco Leyton

Marco Leyton, Ph.D.
Professor, Department of Psychiatry
McGill University

MedicalResearch.com: What is the background for this study? What are the main findings?

Response: Drug-related cues are potent triggers for eliciting conscious and unconscious desire for the drug. In people with severe substance use disorders, these cues also activate dopamine release in the dorsal striatum, a brain region thought to be involved in hard-to-break habits and compulsions.

In the present study we found evidence that drug cues also activate this same dopamine response in non-dependent ‘recreational’ cocaine users.

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Cancer Drug May Mitigate Compulsive Cocaine Memories

MedicalResearch.com Interview with:
Dr Stefania Fasano
Cardiff University

MedicalResearch.com: What is the background for this study?

Response: Exposure to drugs of abuse such as cocaine produces intense and long-lasting memories that are critical in the transition from recreational drug-taking to uncontrolled drug use. In the brain, addictive drugs usurp cellular circuits and signalling molecules involved in normal memory processes; hence, these drug-related memories resist extinction and contribute to high rates of relapse. Despite almost five decades of experimental research, there are currently no approved medications for cocaine dependence.

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Why People With Cocaine Addiction Don’t Change?

MedicalResearch.com Interview with:
Dr Karen Ersche PhD
University of Cambridge
Department of Psychiatry
Brain Mapping Unit
Herchel Smith Building
Cambridge UK

MedicalResearch.com: What is the background for this study?

Dr. Ersche: Cocaine addiction is a major public health problem that is associated with significant harm – not just for the individual, but also for their families and for society as a whole. Without medically proven pharmacological treatments, therapeutic interventions mainly rely on psychosocial approaches, but behaviour in people with cocaine addiction remains extremely difficult to change.

The impetus for this study was to find out why people with cocaine addiction are so resistant to change. One possibility would be that they have a strong tendency to develop habits, which means that they show patterns of behaviour that are not under direct voluntary control.

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Increased Drug Overdoses and Deaths Not Limited To High Intensity Drug Trafficking Areas

MedicalResearch.com Interview with:

Jeanine Buchanich, Ph.D. Deputy director of the Graduate School of Public Health’s Center for Occupational Biostatistics and Epidemiology Research assistant professor in Pitt Public Health’s Department of Biostatistics University of Pittsburgh

Dr. Jeanine Buchanich

Jeanine Buchanich, Ph.D.
Deputy director of the Graduate School of Public Health’s Center for Occupational Biostatistics and Epidemiology
Research assistant professor in Pitt Public Health’s Department of Biostatistics
University of Pittsburgh

MedicalResearch.com: What is the background for this study? What are the main findings?

Dr. Buchanich:  Using the Mortality and Population Data System, a unique repository and retrieval system for detailed death data from the National Center for Health Statistics, housed at the University of Pittsburgh Graduate School of Public Health, my team examined overdose deaths in the U.S. from 1979 to 2014. We started with 1979 because changes in reporting cause of death make it impossible to make comparisons with previous years. 2014 is the most recent year for which data are available.

The counties with the largest increases in overdose death rates were clustered in southern Michigan; eastern Ohio and western Pennsylvania; eastern Pennsylvania, New Jersey and much of southeastern New York; and coastal New England. Counties in the Midwest, California and Texas have seen little to no increase in overdose death rates.

We cross-referenced the mortality data with counties in the High Intensity Drug Trafficking Areas program, which was created by Congress in 1988 to provide 31 high drug-trafficking areas of the U.S. with coordinated law enforcement resources dedicated to reducing trafficking and production. High Intensity Drug Trafficking Areas with high overdose death rates were mostly concentrated in Appalachia and the Southwest U.S., whereas such areas with lower death rates were near the borders in California, Texas and southern Florida.

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Sustained Release Dexamfetamine Reduced Cocaine Use in Crack Addicts

MedicalResearch.com Interview with:

Mascha Nuijten MSc Researcher/ PhD candidate Brijder Research (PARC) The Hague The Netherlands

Mascha Nuijten

Mascha Nuijten MSc
Researcher/ PhD candidate
Brijder Research (PARC)
The Hague
The Netherlands

MedicalResearch.com: What is the background for this study? What are the main findings?

Response: Crack-cocaine dependence is a complex disorder, for which no proven effective pharmacotherapy is yet available. Prior to our study, sustained-release dexamfetamine was found to be a promising treatment for cocaine dependence in several studies, but no studies so far had shown a convincing benefit in terms of substantial cocaine use reductions. Therefore, we investigated the efficacy of sustained-release (SR) dexamphetamine in a robust dose of 60 mg/day in chronic crack-cocaine dependent patients.

We found that the number of days of cocaine use decreased with almost 40% in the dexamfetamine group, compared with 9% in the matched placebo group. In addition, the number of cocaine self-administrations on days that patients used crack-cocaine decreased with 43% in the dexamfetamine group and with 7% in the placebo group. Thus, SR dexamfetamine both contributed to cocaine abstinence and to cocaine use reductions.

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Cocaine Chief Cause of Cardiovascular Death In Young People

MedicalResearch.com Interview with:
Luis F. Callado M.D., Ph.D.
Department of Pharmacology
University of the Basque Country
CIBERSAM

Medical Research: What is the background for this study? What are the main findings?

Dr. Callado: Cocaine is the most commonly used illicit stimulant drug in Europe. The use of cocaine has become a major issue for drug policy, with also important health implications, including potentially lethal cardiovascular complications. In this way, several case series have suggested a relationship between cocaine use and cardiovascular diseases in young adults. Furthermore, cocaine use has been also associated with sudden and unexpected death.

Our results demonstrate that the recent use of cocaine is the main risk factor for sudden cardiovascular death in persons between 15 and 49 years old. Thus, persons that consumed cocaine recently presented a 4 times higher risk for sudden cardiovascular death than those who did not use cocaine. The morphological substrate of sudden cardiovascular death associated to cocaine use is a structural pathology not diagnosed in life. Usually, sudden death is the first manifestation of the disease.

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Cocaine: Brain Reward Circuitry Altered, even in Former Users

MedicalResearch.com Interview with:
Krishna Patel, M.S.
Clinical Data Analyst
Hartford Hospital|Institute of Living
Olin Neuropsychiatry Research Center
Hartford, CT-06106

MedicalResearch.com: What are the main findings of the study?

Answer:  We looked at brain response to a monetary incentive delay (MID) task in current and former cocaine users compared to healthy controls using functional MRI. The task measures aspects of sensitivity to rewards and punishments. Current cocaine users showed abnormal under-activation in reward circuitry compared to healthy controls. In some of those regions former cocaine users (who had an average of 4years of abstinence from cocaine) also showed abnormalities. These former users also showed over-activation in the ventral tegmental area of the midbrain, (an important region containing dopamine cell bodies) compared to both healthy controls and current cocaine users. Current and former cocaine users also scored higher on specific impulsivity measures, compared to healthy controls.
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