Cannabis (drug) - Wikipedia
Tetrahydrocannabinol (THC) is the main psychoactive component of cannabis, which is one of the 483 known compounds in the plant, including at least 65 other cannabinoids, such as …
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) …
Marijuana | History, Effects, THC, & Legality | Britannica
4 days ago · 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 long …
Marijuana: Effects, Medical Uses and Legalization - Drugs.com
Marijuana and Cannabis information from Drugs.com, Including marijuana uses, side effects, and legal status.
Cannabis (Marijuana) | National Institute on Drug Abuse (NIDA)
Sep 24, 2024 · In recent years, there have been big increases in the variety of cannabis products and how much THC they have, as well as a greater variety of ways people can consume them. …
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.
Cannabis Frequently Asked Questions | Cannabis and Public Health …
Jan 31, 2025 · Answers to the most frequently asked questions surrounding cannabis.
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 …
Marijuana Legality by State 2025 | Where Is Weed Legal? | DISA
Dec 1, 2025 · 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…?”