The Obama administration is planning to remove a major roadblock to marijuana research, officials said Wednesday, potentially spurring broad scientific study of a drug that is being used to treat dozens of diseases in states across the nation despite little rigorous evidence of its effectiveness.

Supporters of the new push to legalize medical marijuana in Ohio have added several new medical conditions to a proposed constitutional amendment, including chronic traumatic encephalopathy, or CTE.

Supporters of the new push to legalize medical marijuana in Ohio have added several new medical conditions to a proposed constitutional amendment, including chronic traumatic encephalopathy, or CTE.

Oregon should fund an independent marijuana institute to support and conduct world-class research into the drug's medical and public health benefits, says a task force that includes state officials, scientists and leading physicians.

DALLAS – Researchers at UT Southwestern Medical Center report the most detailed 3-D structure to date of the brain receptor that binds and responds to the chemical at the root of marijuana’s high.

Salk Institute scientists have found preliminary evidence that tetrahydrocannabinol (THC) and other compounds found in marijuana can promote the cellular removal of amyloid beta, a toxic protein associated with Alzheimer's disease.

The 55-and-older crowd is now the fastest-growing demographic of pot users in the country.

Research shows people with chronic pain or mental health issues prefer taking cannabis over prescription opioid medications to treat symptoms.

Researchers plan to start recruiting veterans in September, adding two participants per month, per site. The study should run about two years.

Consumers who live in states with legalized private cannabis markets have access to more potent and chemically diverse pot than marijuana researchers.

Consumers who live in states with legalized private cannabis markets have access to more potent and chemically diverse pot than marijuana researchers.

With legalization of marijuana increasing across the United States, there is more focus than ever on identifying the risks and benefits of the drug. A new study provides further insight, after finding men experience greater pain relief with marijuana use than women.

The most comprehensive research review ever done on the topic found that marijuana can help battle depression, anxiety, post-traumatic stress disorder, and even addictions to alcohol and painkillers.

Scientists have found that lasting stress also depresses endocannabinoids -- neurotransmitters similar to the active ingredients in cannabis -- and that, in turn, can depress us.

Wanted: Someone to grow marijuana for the federal government. Benefits: A contract likely worth millions and the chance to enable medical research. Requirements: Ability to deal with the costs and regulations that come with growing an illegal drug for the federal government.

Wanted: Someone to grow marijuana for the federal government. Benefits: A contract likely worth millions and the chance to enable medical research. Requirements: Ability to deal with the costs and regulations that come with growing an illegal drug for the federal government.

Dr. Raphael Mechoulam laid the scientific foundation upon which all modern cannabis knowledge is built.

Before cannabinoid testing and genetic profiling of the cannabis plant, consumers would judge a batch of weed based on its smell, taste, and color.

John Hudak isn’t a politician, a legalization advocate, or a cannabis entrepreneur. He walks unrecognized through industry conferences. But in the past six months, he’s quietly become one of the most influential voices on national cannabis policy.

John Hudak isn’t a politician, a legalization advocate, or a cannabis entrepreneur. He walks unrecognized through industry conferences. But in the past six months, he’s quietly become one of the most influential voices on national cannabis policy.

More than half of US states have legalized marijuana for medical use, but only now is the nation's first research facility for medical marijuana opening.

In the first study of its kind, scientists have analyzed long-term marijuana use in teens, comparing IQ changes in twin siblings who either used or abstained from marijuana for 10 years.

Want to take a bite out of the American obesity epidemic? Legalize medical marijuana. That's the counterintuitive finding of a new study in the journal Health Economics.

Most doctors approach medical marijuana with a great deal of uncertainty, because drug laws have hindered researchers' ability to figure out what pot can and can't do for sick patients. That could soon change.

Cannabis consumers may experience distortions in their perception of time, often reporting how minutes can feel like they stretch to hours on end -- an unsettling experience, to say the least.

With companies marketing drugs directly to consumers promising cures for almost anything, an increasingly destigmatized cannabis seems a likely target for the industry’s next game-changing medicine.

Older Americans are among the fastest growing groups of pot users, according to recent research and drug surveys.

It’s possible that there has been no greater contributor to the cultural shift currently occurring around cannabis use in North America than the growing understanding of its medical applications.

It's going to be pretty hard to keep weed illegal when your grandparents are smoking it to prevent Alzheimer's.