Substance abuse Archive – In what is believed to be the first controlled human study of the effects of salvinorin A, the active ingredient in Salvia divinorum, a controversial new hallucinogen featured widely on YouTube and other internet sites, Johns Hopkins researchers report that the effects are surprisingly strong, brief, and intensely disorienting, but without apparent short-term […] – Many brain imaging studies have reported that tobacco smoking is associated with large-scale and wide-spread structural brain abnormalities, and a new study has found that gray matter brain cells related to self-control and decision-making are thinner in smokers. The cerebral cortex is a specific area of the brain responsible for many important higher-order […]

An international team of immunologists studying the effects of marijuana (cannabis) have discovered how smoking marijuana can trigger a suppression of the body’s immune system. The research, published in the European Journal of Immunology, reveals why marijuana users are more susceptible to certain types of cancers and infections. The team, led by Dr Prakash Nagarkatti […] – Scientists at the University of Liverpool have found that high levels of a stress hormone in recovering alcoholics could increase the risk of relapse. The study showed that cortisol, a hormone produced by the adrenal gland in response to stress, is found in high levels in chronic alcoholics, as well as those recovering […] – Many smokers may need more time using smoking cessation to be successful at quitting tobacco smoking, according to a new study. The study – from researchers at the Oregon Health & Science University Smoking Cessation Center – may change the way clinicians make treatment decisions for their patients who smoke and want to […]

Children born to mothers prescribed the heroin substitute methadone during pregnancy may be at risk of a wide variety of vision and eye problems, according to a small study published in the British Journal of Ophthalmology. There may be as many as 350,000 children in the UK whose parents are problem drug users, say the […]