ABC News' Becky Worley takes a look at what science and others have to say about the increasingly popular sleep aid.

Many older adults are using medical marijuana to treat a variety of conditions, but experts say that conflicting laws, unclear safety standards and complicated rulemaking processes mean it could be years before Medicare may cover the drug

Concerns are growing over cases in which kids accidentally ingesting marijuana edibles. ABC News’ Lionel Moise has more.

Oklahoma voters are deciding whether to legalize marijuana sales for those 21 and older

New York is doubling the number of licenses it’s awarding for a first round of legal marijuana shops

While the FDA hasn’t officially regulated the use of CBD, some companies claim it can be used to treat some diseases and certain conditions.

ABC News chief medical contributor Dr. Jennifer Ashton breaks down a new study about marijuana that links it to a higher risk of heart disease.

Officials are urgently warning parents who use edible marijuana products to keep them locked away from children who may accidentally consume the products.

New York City Mayor Eric Adams and Manhattan’s top prosecutor say they will go after landlords who allow hundreds of illicit shops to operate

A federal judge in Oklahoma has ruled a federal law prohibiting people who use marijuana from owning firearms is unconstitutional

Adults ages 21 and older now can legally buy marijuana for recreational use in Missouri

The FDA said a new framework is needed for regulating CBD products due to safety concerns, especially from long-term use.

The medical center warned the calls will continue to rise with marijuana dispensaries slated to open across the state this year.

Public health advocates want more scrutiny on marijuana marketing.

The Minnesota Legislature has embarked on a path toward legalizing recreational marijuana

Connecticut’s first round of recreational cannabis sales for adults 21 and older have begun

A new U.S. study finds that reports of young children accidentally eating marijuana-laced treats rose sharply as pot became legal in more places

ABC investigative reporting documents “The Human Cost” of dangerous drug cartels trafficking farm workers taking over the black market.

ABC News' Mireya Villarreal reports on two undocumented women who were trafficked by illegal marijuana cartels and detail the horrors they endured while being abused and exploited.

Rep. Earl Blumenauer and DHS Special Agent in Charge Robert Hammer talks about solutions to contain the spread of illegal weed farms and how to protect trafficked undocumented immigrants.

ABC News’ Mireya Villarreal previews a year-long investigation in southern Oregon where organized crime syndicates are attempting to blend in with licensed pot farms to exploit captive workers.

The survivor of the shooting that killed four people has been arrested.

The retail shops will be able to first deliver their products by bicycles, scooters or other similar transportation methods, the state officials said.

The first legal sales of marijuana in New York City will be likely be delivered on bikes and scooters.

About half of the state's medical marijuana operators will expand.

A 20-year study found jumps in poison center reports.

Cannabis use during pregnancy may cause babies to have higher rates of preterm birth, low birthweight and birth defects.

Police have identified a suspect in a quadruple homicide outside a town in Oklahoma but won't release a name because doing so would put other people in danger.

Congress has tried, unsuccessfully, to pass this type of legislation before to decriminalize marijuana.

New York has issued the state's first 36 cannabis dispensary licenses, taking a monumental step in establishing a legal and lucrative marketplace for recreational marijuana

Researchers from Ottawa Hospital General studied approximately 150 lung scans from marijuana smokers, tobacco-only smokers and nonsmokers.

The researchers who led the study say their findings suggest smoking marijuana may be more harmful than people realize.

Marijuana advocates are looking toward their next states to target after experiencing some mixed results in the recent elections

A federal judge has temporarily blocked New York from issuing recreational marijuana dispensary licenses in Brooklyn and parts of upstate New York while a legal challenge to the state’s selection process is being considered

Results for ballot initiatives to legalize recreational marijuana passed in two states and failed in three others, according to early election results.

Voters have approved recreational marijuana in Maryland and Missouri and rejected it in Arkansas and North Dakota

Kevin Sabet, CEO of Smart Approaches to Marijuana and Arthur Ago, director of the criminal justice project for The Lawyer’s Committee, discuss what’s at stake five days ahead of elections.

Donors associated with companies holding medical marijuana licenses are providing most of the funding for ballot measures that would legalize recreational marijuana in several states

Advocates say say immigrants deported on cannabis charges should be eligible for Biden's clemency move.

For the second time in two years, South Dakota voters will decide if their state will be the next one to offer legalized cannabis to adults.

She's charged with felony murder and felony child neglect.

Oklahoma Gov. Kevin Stitt has set a special election for March 7 for voters to decide whether to legalize the recreational use of marijuana

President Joe Biden's decision to pardon thousands of people convicted of simple possession of marijuana under federal law could give a boost to Election Day ballot proposals in five states that would legalize the drug

California’s four-year-old legal marijuana market is in disarray

President Joe Biden’s executive action pardoning Americans with federal convictions for simple marijuana possession will benefit thousands of people by making it easier for them to find housing, get a job or apply to college

President Biden explains his new move, a potential first stop in decriminalizing pot. ABC News’ Andrew Dymburt reports

"No one should be in jail for using or possessing marijuana," Biden said.

ABC News medical contributor and medical toxicologist Dr. Stephanie Widmer and clinical psychologist Jeff Gardere discuss what's behind the increase.

A new study on young adults showed their marijuana and hallucinogen use has reached historic highs.

A new study shows marijuana and hallucinogen use among young adults 19 to 30 years old has increased to the highest levels since the late 1980s.