Marijuana (pot, hash, weed, cannabis) is a drug that comes from the hemp plant. Marijuana can have serious effects such as paranoia, depression, memory loss, lower testosterone, and more. Marijuana can sometimes be addictive. Follow the links below to find WebMD's comprehensive coverage about the effects of marijuana use and abuse and much more.
Recreational Marijuana FAQ
Learn how recreational marijuana use can affect your health. And find out if it's addictive.
How Marijuana Affects Your Mind and Body
Pot, weed, dope, or marijuana. No matter what you call it, here’s what it will do to your body and brain.
Infertility, Smoking and Drugs
Smoking and drug use may cause infertility in both men and women.
What Is Marijuana Abuse?
Learn more about the signs of this issue and how it’s treated.
Mary Louise Parker on Momhood and Marijuana
Weeds Actress Mary Louise Parker Talks About Blended Families, Acting, and Legalizing Pot.
Is Marijuana Safe?
Although there isn't much evidence that the occasional toke leads to long-term health problems, researchers are concerned that long-term, heavy pot smoking can leave lingering effects.
Medical Marijuana in Colorado
Denver pot shops are at the center of Colorado’s marijuana rush.
'Just Say No' Isn't Enough
Researchers say parents may have far more influence than they think on whether your kids try drugs.
Slideshows & Images
Slideshow: Commonly Abused Drugs
This slideshow features pictures of commonly abused prescription and over-the-counter drugs, including depressants, pain relievers, and stimulants.
Slideshow: Lung Cancer Risks -- Myths and Facts
Cigar smoke, menthol, pollution? See what can increase your risk of lung cancer and what's fiction. Learn what to avoid and surprise risks.