The people who work at marijuana dispensaries have not know enough about marijuana to give accurate recommendations, a new survey finds.
Marijuana is an age-old drug made from parts of the Cannabis plant. It contains the mind-altering chemical tetrahydrocannabinol, or THC. Several countries, and a number of U.S. states, have legalized the drug for medical or recreational purposes. Here's the latest news on marijuana, from how it affects the brain and body, to its potential medical benefits or harms, to possible impacts of legalization.
Marijuana use among pregnant women in the U.S. increased by 62 percent from 2002 to 2014, a new study finds.
An uncommon drug caused a "zombie" outbreak in a New York City neighborhood this past summer, and now a new report identifies the exact compound that the affected people took.
Teen use of many illegal and legal drugs — including ecstasy, cocaine, alcohol and tobacco — is now at record lows.
Electricity-intensive cannabis production has a big carbon footprint, but with legalization, some eco-conscious growers want to make pot a shining model of sustainability.
A compound found in marijuana may help reduce seizures in people with some types of epilepsy, new research suggests.
Drug tests aren't foolproof: A number of harmless, everyday substances can trigger a false-positive result.
Scientists have turned to marijuana-like synthetic compounds to provide opioid-like pain relief without the risk of addiction or a high.
Using marijuana may be tied to a type of cardiomyopathy, or weakening of the heart muscle, a new study says.
Voters in California, Massachusetts and Nevada decided yesterday (Nov. 8) to legalize the recreational use of marijuana in their states.
Teens who take opioid painkillers without a prescription also often use cannabis, according to a new study.
People who use alcohol and marijuana together may be at greater risk for alcohol-related problems, such as drunk driving and health issues, than those who use only alcohol, a new study finds.
More than 50 percent of Americans changed their minds about whether they would smoke legal pot, depending on the specifics of the state laws.
People in nine states will vote on legalizing recreational or medical marijuana in 2016. Here is a look at the facts about marijuana legalization for voters.
About 2,500 years ago, mourners buried a man in an elaborate grave, and covered his chest with a shroud made of 13 Cannabis plants, according to a new study.