Cannabis (drug) - Wikipedia
Native to Central or South Asia, cannabis has been used as a drug for both recreational and entheogenic purposes and in various traditional medicines for centuries.
Marijuana (Cannabis, Weed): What It Is, Side Effects & Risks
Marijuana: This term refers to parts of or products from the Cannabis sativa plant that contain substantial amounts of tetrahydrocannabinol (THC). This is the main chemical (cannabinoid) …
Cannabis (Marijuana) | National Institute on Drug Abuse (NIDA)
Sep 24, 2024 · Learn more about NIDA’s research on the health effects of cannabis.
About Cannabis | Cannabis and Public Health | CDC
Feb 15, 2024 · Cannabis, which can also be called marijuana, weed, pot, or bud, refers to the dried flowers, leaves, stems, and seeds of the cannabis plant. The cannabis plant contains …
Marijuana | History, Effects, THC, & Legality | Britannica
Dec 25, 2025 · What is marijuana? Marijuana is a drug composed of the leaves and flowers of plants in the genus Cannabis. Documented as far back as 2700 BCE in China, marijuana has …
Know the Effects, Risks and Side Effects of Marijuana - SAMHSA
Sep 9, 2025 · Marijuana refers to the dried leaves, flowers, stems, and seeds from the Cannabis sativa or Cannabis indica plant. Marijuana is a psychoactive drug that contains close to 500 …
Marijuana - Mayo Clinic
Aug 15, 2025 · Find out why cannabis, also called weed or marijuana, is used and the possible risks.
Marijuana: Effects, Medical Uses and Legalization - Drugs.com
Marijuana and Cannabis information from Drugs.com, Including marijuana uses, side effects, and legal status.
Marijuana Legality by State 2025 | Where Is Weed Legal? | DISA
2 days ago · See where marijuana is legal in 2025. Interactive map shows state-by-state weed laws, medical and recreational use, and answers “can I smoke weed in…?”
Marijuana - DEA.gov
Dry, shredded, green/brown mix of flowers, stems, seeds and leaves from the cannabis sativa plant. THC (delta-9-tetrahydrocannabinol) is the main ingredient that produces the …