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 cannabidiol (CBD). …
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 long been …
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) that causes mind …
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
5 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…?”
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. Unless …
Cannabis Frequently Asked Questions | Cannabis and Public Health
Jan 31, 2025 · Answers to the most frequently asked questions surrounding cannabis.
Marijuana - Mayo Clinic
Aug 15, 2025 · Find out why cannabis, also called weed or marijuana, is used and the possible risks.
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 chemicals, …
Marijuana - MedlinePlus
Mar 8, 2024 · Marijuana is a green, brown, or gray mix of dried, crumbled parts from the marijuana plant. The plant contains chemicals which act on your brain and can change your mood or consciousness.