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  1. Nicotine - Wikipedia

    Nicotine is typically consumed through tobacco smoking, vaping, or other nicotine delivery systems. An average cigarette yields about 2 mg of absorbed nicotine, a dose sufficient to produce reinforcement …

  2. What Nicotine Is and How It Affects Your Body - Verywell Health

    Dec 4, 2025 · Nicotine, a highly addictive stimulant found primarily in tobacco plants, plays a significant role in smoking addiction due to its effects on the brain's pleasure and reward systems.

  3. What Nicotine Does to Your Body - Verywell Mind

    Sep 24, 2025 · Nicotine increases heart rate and blood pressure, and long-term use can damage your heart and lungs. Overcoming nicotine addiction is hard, but therapy and nicotine replacement can …

  4. Nicotine Is Why Tobacco Products Are Addictive | FDA

    Nicotine is what keeps people using tobacco products. However, it’s the thousands of chemicals contained in tobacco and tobacco smoke that make tobacco use so deadly.

  5. Nicotine dependence - Symptoms and causes - Mayo Clinic

    Jun 14, 2025 · Nicotine is the chemical in tobacco that keeps you smoking tobacco. Nicotine reaches the brain within seconds of taking a puff. In the brain, nicotine increases the release of brain chemicals …

  6. Nicotine: Facts, effects, and dependency - Medical News Today

    Jul 1, 2024 · Nicotine is a highly addictive substance found in tobacco products and can be the reason many people consume tobacco. It may cause side effects such as dizziness, racing heartbeat, and …

  7. The Hidden Healing Power of Nicotine - Psychology Today

    Jun 8, 2025 · What if nicotine—which we associate with addiction—actually holds the key to treating depression, ADHD, Alzheimer's, & Parkinson's? Discover the surprising medical revolution.

  8. The double-edged nature of nicotine: toxicities and therapeutic ...

    Nicotine is the primary addictive component of cigarette smoke and is associated with various smoking-related diseases. However, recent research has revealed its broader cognitive-enhancing and anti …

  9. Nicotine | Tobacco, Addiction, Poison | Britannica

    Nov 28, 2025 · Nicotine is the chief addictive ingredient in the tobacco used in cigarettes, cigars, and snuff. In its psychoactive effects, nicotine is a unique substance with a biphasic effect; when inhaled …

  10. Nicotine benefits, dosage, and side effects - Examine

    Aug 28, 2025 · Nicotine is the main stimulatory compound found in cigarettes and is now sold in vaporizers and patches in isolation. It works on the acetylcholine system, and is implicated in …