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  1. Marijuana | History, Effects, THC, & Legality | Britannica

    Dec 25, 2025 · Marijuana, drug composed of the leaves and flowers of plants in the genus Cannabis. Marijuana is known by several other names, including pot, grass, and weed. It can …

  2. What to know about pot addiction and treatment | AP News

    It’s called cannabis use disorder and it’s on the rise, affecting about 3 in 10 people who use pot, according to the U.S. Centers for Disease Control and Prevention. Here’s how to know …

  3. Cannabis (drug) - Wikipedia

    Cannabis (/ ˈkænəbɪs /), [2] commonly known as marijuana (/ ˌmærəˈwɑːnə /), [3] weed, pot, and ganja, among other names, is a non-chemically uniform psychoactive drug from the Cannabis …

  4. Know the Effects, Risks and Side Effects of Marijuana - SAMHSA

    Marijuana is the most commonly used illegal substance in the U.S. and its use is growing. Marijuana use among all adult age groups, both sexes, and pregnant women is going up. At …

  5. Marijuana: Effects, Medical Uses and Legalization - Drugs.com

    Marijuana is used as a psychoactive, mind altering recreational drug and for certain medical ailments. The active agent that leads to the "high" is THC (delta-9-tetrahydrocannabinol). …

  6. Marijuana - Mayo Clinic

    Aug 15, 2025 · People sometimes use cannabis to treat health conditions. This is known as medical cannabis, also called medical marijuana. Cannabis contains chemicals called …

  7. 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 …

  8. Marijuana: Effects on the Body - WebMD

    Dec 23, 2024 · What Is Marijuana? Marijuana — also called weed, grass, or pot, among other names — is a mind-altering substance that comes from the cannabis plant.

  9. Marijuana (Cannabis, Weed): What It Is, Side Effects & Risks

    Marijuana is a mind-alerting substance that comes from the Cannabis sativa plant. Other names for it are weed, pot and dope.

  10. 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. …