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

    Dec 25, 2025 · Marijuana is known by a variety of other names, including pot, tea, grass, and weed. It is usually dried and crushed and put into pipes or formed into cigarettes (joints) for smoking.

  2. 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.

  3. 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.

  4. 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 whether you …

  5. Marijuana Side Effects: Physical, Mental, and Long-Term Effects

    May 5, 2025 · Marijuana can be an addictive substance. Starting use during adolescence makes eventual compulsive misuse or the development of addiction more likely. Increased risk of other …

  6. 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 …

  7. 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.

  8. 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 cannabinoids, which …

  9. 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 psychoactive effect. …

  10. Cannabis: Uses (Medical), Effects & Warnings - Drugs.com

    Consumption of marijuana leads to a psychoactive drug effect. Do not drive, operate machinery, or perform other hazardous activities while using cannabis (marijuana). It may cause dizziness, …