Basic Science, Published April 2014
Exposing rats to THC increases the likelihood that the animals will later self-administer nicotine. THC-exposed rats are also willing to work harder to obtain nicotine. When extrapolated to people, the findings suggest that THC’s pharmacological impact on the brain may make a person who uses marijuana more vulnerable to developing nicotine addiction, an underappreciated health consequence of marijuana use.
Public Health, Published April 2014
Almost one-third (32 percent) of the roughly 42,000 Monitoring the Future survey respondents reported having used marijuana during their lifetime. However, abuse of many other drugs—methamphetamine, heroin, cocaine, and some prescription medications—declined.
Prevention, Published April 2014
Intensified screening for HIV among injection drug users receiving opioid agonist therapy could prevent more than twice as many new infections as current screening practice. A recent study based on mathematical modeling found that screening every 6 months instead of annually, and adding viral RNA testing to the currently used HIV antibody testing, could improve both effectiveness and cost-effectiveness.
Treatment, Published March 2014
Active drug use before incarceration was associated with decreased engagement in HIV treatment among HIV-infected jail detainees. The severity of drug dependence correlated with worsening measures of engagement in HIV treatment. The study concludes that evidence-based treatment for drug abuse in jails may result in improved HIV treatment outcomes, which in turn could help slow HIV-transmission rates in the United States.
Basic Science, Published March 2014
Methamphetamine alters brain structures involved in decision-making and impairs the ability to suppress habitual behaviors that have become useless or counterproductive. The two effects were correlated, indicating that the structural change underlies the decline in mental flexibility.
Treatment, Published March 2014
Microneedles are an innovative technique for delivering medications through the skin, a route that could particularly benefit patients receiving naltrexone therapy for opioid and alcohol dependence. Researchers have found a way to use the transdermal technique to deliver a single treatment of naltrexone that lasts for 7 days.
Treatment, Published February 2014
Prevention, Published February 2014
Teen mothers on three American Indian reservations improved on several measures of parenting after participating in Family Spirit, a home-visiting intervention developed with NIDA support. At 12 months postpartum, the women’s children exhibited reduced rates of emotional difficulties predicting later drug abuse and other behavioral problems. Infants at highest risk—those whose mothers had histories of drug abuse—benefited the most.
Basic Science, Published January 2014
Ketoprofen, an anti-inflammatory agent commonly prescribed to treat arthritis, reduces neuronal damage in rats that have been exposed to chronic stress and methamphetamine. If this finding of a recent NIDA-supported study extrapolates to humans, anti-inflammatory medications may gain a place in the treatment of methamphetamine addiction.
Treatment, Published January 2014
Study patients with HIV–hepatitis C coinfection progressed to successive degrees of severity of liver fibrosis 9 years sooner than those infected with HCV alone. Further findings from the study suggest that suppressing HIV with antiretroviral medications may slow HCV-related liver fibrosis.