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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. Nicotine: How It Works, Uses, Risks, Benefits - Verywell Health

    Oct 13, 2025 · Nicotine is an addictive organic compound found in tobacco plants. It’s the chemical that makes smoking cigarettes, chewing tobacco, and vaping so hard to quit. Nicotine is associated with …

  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: 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 …

  5. The Hidden Healing Power of Nicotine - Psychology Today

    Jun 8, 2025 · Nicotine works by binding to receptors in the brain called “nicotinic acetylcholine receptors.” These receptors are important in learning, memory, attention, and neuroprotection. When …

  6. 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.

  7. 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 …

  8. 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 …

  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 - American Lung Association

    Sep 9, 2024 · Nicotine is the addictive drug in tobacco products. Cigarettes, cigars, smokeless tobacco and nearly all e-cigarettes contain nicotine. The tobacco industry continuously develops and markets …