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.
Infertility, Smoking and Drugs
Smoking and drug use may cause infertility in both men and women.
Infertility: Tobacco, Marijuana, and Other Drugs
WebMD explains how tobacco, marijuana, alcohol, and other drugs may cause infertility.
Help Kids Resist Drugs
Get help talking to your children about avoiding drugs.
ADHD and Substance Abuse
Are people with ADHD at higher risk of alcohol and drug abuse? WebMD examines the link.
My Kid Is Drug-Free
Should schools have the right to test your kids for drugs? One father said no -- and his decision has embroiled him in a high-stakes legal battle over constitutional rights.
Top 10 Drinking Dangers
Before your next drink, learn more about what doesn't mix well with alcohol.
'Just Say No' Isn't Enough
Researchers say parents may have far more influence than they think on whether your kids try drugs.
Mary Louise Parker on Momhood and Marijuana
Weeds Actress Mary Louise Parker Talks About Blended Families, Acting, and Legalizing Pot.
Slideshows & Images
Commonly Abused Drugs
This slideshow features pictures of commonly abused prescription and over-the-counter drugs, including depressants, pain relievers, and stimulants.
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: Lung Cancer Risks -- Myths and Facts