Cannabis use among people experiencing a first episode of psychotic illness is linked to a 50 per cent heightened risk of hospital admission--including compulsory detention (sectioning)--as well as longer inpatient stay, reveals the largest study of its kind, published in the online journal BMJ Open.

Cannabis use was also linked to higher numbers of prescriptions for different antipsychotic drugs, the findings show, suggesting that it may contribute to treatment failure, say the researchers.

Cannabis use has been linked to an increased risk of psychotic episodes before, particularly if used during the teen years, but it is not clear if it has any impact on relapse risk in those with long term psychosis.

Drinking a lot of coffee every day--more than 900 ml (30 fluid ounces) or around six cups--is linked to a reduced risk of multiple sclerosis (MS), finds research published online in the Journal of Neurology Neurosurgery & Psychiatry.

Caffeine, a central nervous system stimulant, has neuroprotective properties and can suppress the production of chemicals involved in the inflammatory response, which may explain the association found, suggest the researchers.

While it remains to be seen whether coffee drinking could ward off the development of MS, cautions a linked editorial, the findings add to the growing body of evidence indicating that coffee may be good for our health, it suggests.

GAINESVILLE, Fla. -- Using someone else's medication is the most common form of prescription stimulant misuse among adolescents, according to a University of Florida Health study, which found that 88 percent of teens who used the drugs non-medically in the past 30 days said they had obtained the medications from someone else.

Chimpanzees often use tools to extract or consume food. Which tools they choose for which purpose, however, can differ depending on the region where they live. Researchers of the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany, have thus initiated the 'Pan African Programme: The Cultured Chimpanzee' and, since 2010, have collected data on chimpanzee behavior, demography and resource availability across Africa following a standardized protocol. This is how the researchers encountered a thus far unknown behavior: In West Africa chimpanzees throw stones at trees resulting in conspicuous accumulations at these sites. Why exactly the animals do this the researchers do not yet know, yet the behavior appears to have some cultural elements.

A protein modified to increase the amount of time it circulates in the bloodstream appears to reverse liver fibrosis and cirrhosis in rats, according to results of a study led by Johns Hopkins researchers.

The investigators say the findings, reported ahead of print in the March 3 early view edition of Hepatology, advance the search for a potential cure for the thousands of patients worldwide living with these incurable diseases. At present, there is little effective treatment and no cure other than liver transplantation, which carries its own risks and often fails.

The surgical approach to total hip replacement (THR)--either from the front of the body or the side/back (anterior versus posterior)--has no impact on outcomes six months after surgery, according to research presented today at the 2016 Annual Meeting of the American Academy of Orthopaedic Surgeons (AAOS).