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  1. Cannabis - Wikipedia

    Industrial hemp textile products are made from cannabis plants selected to produce an abundance of fibre. Cannabis also has a long history of being used for medicinal purposes, and as a recreational …

  2. Cannabis (Marijuana) | National Institute on Drug Abuse (NIDA)

    Sep 24, 2024 · Cannabis refers to the dried leaves, flowers, stems, and seeds of the cannabis plant. The plant has many different chemical compounds, including tetrahydrocannabinol (THC), which has …

  3. What Is Cannabis? Facts About Its Components, Effects, and Hazards

    Jun 22, 2023 · Today, more and more people are using the term cannabis to refer to weed. Read on to learn what cannabis is, and find a quick overview of its uses, legality, side effects, and more.

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

    Dec 25, 2025 · marijuana, crude drug composed of the leaves and flowers of plants in the genus Cannabis. The term marijuana is sometimes used interchangeably with cannabis; however, the latter …

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

    Cannabis contains the chemical compound THC (delta-9 tetrahydrocannabinol), which is believed to be responsible for most of the characteristic psychoactive effects of cannabis that leads to the "high" …

  6. Cannabis Frequently Asked Questions | Cannabis and Public Health

    Jan 31, 2025 · Answers to the most frequently asked questions surrounding cannabis.

  7. Marijuana - Mayo Clinic

    Aug 15, 2025 · Find out why cannabis, also called weed or marijuana, is used and the possible risks.

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

    Marijuana is a mind-alerting substance that comes from the Cannabis sativa plant. It has several short-term and long-term effects, many of which scientists are still studying.

  9. Marijuana and CBD Risks and Resources | SAMHSA

    Dec 3, 2025 · Marijuana use comes with risks to health. Today’s marijuana is stronger than ever before. States that have legalized marijuana regulate the drug in widely different ways ― and often it’s not …

  10. 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.