A new scientific study has determined that teenagers who listen to music mentioning the use of marijuana are very likely to actually start smoking the drug. In the experiments that led to this conclusion, more than 959 ninth-graders were followed for a period of time. This allowed the researchers to draw parallels between the music the youth listened to and their drug-use habits as well.

Smoking both tobacco and marijuana increases the risk of respiratory symptoms and chronic obstructive pulmonary disease (COPD), found a new study. Smoking only marijuana, however, was not associated with increased risks.

Scientists have discovered that the brain manufactures proteins that act like marijuana at specific receptors in the brain itself. This discovery may lead to new marijuana-like drugs for managing pain, stimulating appetite and preventing marijuana abuse.

Those in the United States living with HIV/AIDS are more likely to use marijuana than those in Kenya, South Africa or Puerto Rica to alleviate their symptoms, according to a new study.

Frequent and/or long-term marijuana use may significantly increase a man's risk of developing the most aggressive type of testicular cancer. Being a marijuana smoker at the time of diagnosis was associated with a 70 percent increased risk of testicular cancer. The risk was particularly elevated (about twice that of those who never smoked marijuana) for those who used marijuana at least weekly and/or who had long-term exposure to the substance, beginning in adolescence.

Marijuana, a commonly abused drug among high school and college students, is linked to a severe form of vomiting syndrome and compulsive bathing behavior. This form of severe vomiting sickness is increasingly recognized with widespread abuse of marijuana. The syndrome usually subsides with strict abstinence from marijuana abuse.

In a finding that challenges the increasingly popular belief that smoking marijuana is less harmful to health than smoking tobacco, researchers in Canada are reporting that smoking marijuana, like smoking tobacco, has toxic effects on cells.

The pain is debilitating. The only option: smoking medical marijuana. That's the reality for many hepatitis C patients whose road to health includes a liver transplant. Although Canadian transplant centres are more willing than those in the United States, not everyone says yes to liver patients who smoke marijuana, and a University of Alberta researcher says that decision-making process is unacceptable.

Teens who frequently listen to music that contains references to marijuana are more likely to use the drug than their counterparts with less exposure to such lyrics, according to a new study.

Experiments with rodents and humans have shown that cannabinoids, the active ingredients of marijuana, can actually amplify and prolong pain rather than damping it down. This discovery has implications both for the use of marijuana in pain relief and for basic understanding of the connection between transient and chronic pain.