Treating heroin addiction with marijuana? History encourages skeptics

Cannabis news roundup: Weed party in Michigan, Argentina nears medical pot approval and more

Major medical marijuana study hurt by Johns Hopkins withdrawal

Why is reliable marijuana science so hard to find?

Study: Marijuana use increases risks of stroke, heart failure

Medical cannabis: Researchers say government’s stash is woefully low-quality

Video Q&A: Cannabis questions for your doctor

Jeff Sessions wants the facts on cannabis and opioids. Here they are.

Medical report discourages any cannabis use among teens and kids

Potentially lethal bacteria, mold found on some cannabis samples