Drug maker Roche Holding AG has announced it will stop ongoing experiments for HIV treatment medicines after it determined their products did not result in any improvements compared to other drugs currently available.

The company, known for being the first to produce an anti-HIV treatment, will suspend current experiments being done on two other similar products as a response to the findings of a standard product review

Nicotine may be addictive, but it can help boost memory and learning, a new study suggests.

In a research done by scientists from the Institute of Psychiatry at King's College London, the findings showed that the increase in concentration felt by smokers could help fight dementia

A new study by a University of Massachusetts psychologist found out that the mere presence of an open television set in the background may be an environmental hazard for young children.

The basis of the study was observation of 50 children between the ages 1 to 3 one hour each as the tots played alone inside a room with different toys. Their parents were nearby at the time the research was done. There was a small TV set which played an episode of "Jeopardy" while the child played

People with Alzheimer's who exercise regularly had less brain damage than those who did not exercise, a preliminary study suggests. The findings may indicate that staying physically fit could slow the brain shrinkage associated with Alzheimer's disease and lead to development of a treatment, researchers hope.

Researchers from the University of Kansas School of Medicine in Kansas City studied 57 people with early Alzheimer's. Their physical fitness was assessed by measuring their peak oxygen demand while on a treadmill, and brain shrinkage was estimated by MRI scans

World-renowned heart surgeon Dr. Michael DeBakey died of natural causes late Friday, according to the DeBakey Heart and Vascular Center at Methodist Hospital in Houston. He was 99.

In a career spanning more than 70 years ago, DeBakey performed more than 60,000 heart surgeries. His patients include late American presidents John F. Kennedy, Lyndon Johnson and Richard Nixon, the last Shah of Iran and King Hussein of Jordan