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.
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.
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.
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.
Alternative Treatments for Chronic Pain
If you have chronic pain and are looking for alternatives to medication and surgery, you have a lot of options. Alternative pain treatments that doctors once scoffed at are now standard at many pain centers.
Mary Louise Parker on Momhood and Marijuana
Weeds Actress Mary Louise Parker Talks About Blended Families, Acting, and Legalizing Pot.
Slideshows & Images
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.
Slideshow: Commonly Abused Drugs
This slideshow features pictures of commonly abused prescription and over-the-counter drugs, including depressants, pain relievers, and stimulants.