Nicotine
Nicotine is a stimulant that activates nicotinic acetylcholine receptors, modestly sharpening attention and mood while being strongly addictive. Its acute cognitive effects are real but small and short-lived, and any research interest (e.g., epidemiological inverse associations with Parkinson’s) has not translated into therapeutic use. Most real-world harm comes from tobacco combustion, but nicotine itself drives dependence and has cardiovascular effects.
Too little may be associated with
No requirement; withdrawal in dependent users.
Too much may be associated with
Addiction, cardiovascular harm, tobacco-related disease.
Informational only — not medical advice.
Body systems
Functions
- Appetite Regulation (−)
- Arousal (+)
- Hunger Regulation (−)
- Sleep Regulation (−)
- Wakefulness (+)
Diseases
Neurotransmitters
Books (9)
A Gentle Path through the Twelve Steps
Dopamine Nation
Freedom from Nicotine: The Journey Home
Nicotine Anonymous: The Book
Smoke-Free in 30 Days: The Pain-Free, Permanent Way to Quit
The Compass of Pleasure
The Craving Mind: From Cigarettes to Smartphones to Love
The Easy Way for Women to Stop Smoking
The Easy Way to Stop Smoking
Research (9)
- Nicotine and neuronal nicotinic acetylcholine receptors: unraveling the mechanisms of nicotine addiction Li et al. (2025)
- The many enigmas of nicotine Papke (2024)
- E-cigarettes, nicotine, the lung and the brain: multi-level cascading pathophysiology Herman et al. (2020)
- Nicotine Addiction: Neurobiology and Mechanism Tiwari et al. (2020)
- Cholinergic Receptors and Addiction De et al. (2020)
- Dopaminergic and cholinergic learning mechanisms in nicotine addiction Subramaniyan et al. (2015)
- The dopamine theory of addiction: 40 years of highs and lows Nutt et al. (2015)
- The "stop" and "go" of nicotine dependence: role of GABA and glutamate D'Souza et al. (2013)
- Reward, addiction, withdrawal to nicotine De et al. (2011)
Links
Recovery resources
Help for nicotine use and recovery. Not an endorsement or medical advice — see all recovery resources.
Nicotine Anonymous (NicA)
A 12-step fellowship helping people live free of nicotine from smoking, vaping, and tobacco.
- Celebrate Recovery
A Christ-centered 12-step program for people working through addictions and other hurts, habits, and hang-ups.
SMART Recovery
A secular, science-based recovery program using cognitive-behavioral tools for any addictive behavior.
Community
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