The Dangers of Nicotine

Get the Facts

Nicotine is a powerful drug, with a highly addictive nature that makes it difficult for many users to quit. Smoking tobacco products remains the most popular way to consume nicotine, but the rise of alternative nicotine products—including nicotine gums, smokeless tobacco, and vape pens—means the drug is more available with more options than ever.

Some of these alternative products are used legitimately to help people wean themselves off using nicotine, but they are often marketed as a “safe” alternative to smoking, which is false.

Using nicotine in ANY form poses a wide range of health hazards, including…
  • Death
  • Increased risk of cardiovascular, respiratory, and gastrointestinal disorders
  • Decreased immune response
  • Negative impacts on reproductive health and pregnancies
  • Influence on the emergence of cancer cells, proliferation of tumors, and metastasis
  • Sexual dysfunction and ED (erectile dysfunction)
Skeletal structural formula of nicotine

What is Nicotine?

Nicotine is found naturally in plants belonging to the Solanaceae family, but concentrations high enough to have a pharmacological effect on its users are seen only in the tobacco sub-family. Eggplant has the highest concentration of any food with nicotine. However, you would have to eat 23 lbs of eggplant to equal the amount of nicotine in 1 cigarette (which is usually 1 mg).

Human beings have used tobacco for thousands of years, almost exclusively in smoked form, across all countries and cultures. In fact, other than the caffeine found in coffee and tea, nicotine consumed in tobacco is the second most commonly-used drug in the world.

Despite tobacco’s historical popularity, however, the nicotine contained within is a dangerous and highly addictive chemical.

A Dangerous Drug Hiding in Plain Sight

Nicotine can be delivered to users through a number of readily-available products.

Vape pen

Smoked Tobacco

Nicotine ingested by smoking or vaporizing ("vaping").

Delivery Methods
  • Cigarettes
  • Vaping devices
  • E-cigarettes
  • Cigars
  • Bidis
  • Hookahs
  • Kreteks
Canister of snuff

Smokeless Tobacco

Nicotine ingested by snorting, chewing, "dipping" (a pinch of tobacco powder between the lower gum and bottom lip).

Delivery Methods
  • Snuff
  • Spit tobacco
  • Chew/chaw
  • Dip
Nicotine pouches

Other Methods

Nicotine ingested using methods other than tobacco products.

Delivery Methods
  • Nicotine gum
  • Nicotine patch
  • Oral nicotine pouch

What Makes Nicotine So Addictive?

As with illegal drugs such as cocaine and heroin, using nicotine activates your brain’s reward centers and releases dopamine, a chemical messenger that fills you with a sense of euphoria and encourages you to use more to recapture that feeling. It is this constant need for reinforcement that makes you more and more addicted to nicotine with each use.

Why Is Nicotine So Harmful?

Nicotine in any form readily absorbs into the blood when you use it, and immediately stimulates your adrenal glands to release the hormone epinephrine (adrenaline), which increases your blood pressure, breathing, and heart rate. Additionally and most importantly, it damages the inner lining of cells in the blood vessels called the endothelium. This causes endothelial dysfunction which increases the risk of a plaque and plaque rupture inside the arterial blood vessels. This dramatically increases your risk of a heart attack and a stroke. In 2023, a heart attack is the #1 way of dying in the United States and a stroke is #3. Nicotine is the strongest preventable risk factor for both.

Nicotine also damages your respiratory (lungs), renal (kidneys), and reproductive systems, and has been found to be carcinogenic in several studies. It may even cause your body to resist chemotherapy and other cancer treatments. Among many other adverse effects, using nicotine can also increase feelings of anxiety and depression, especially when you try to quit.

A Sobering Statistic
Nicotine-related deaths (mostly from tobacco use) account for more than 480,000 US deaths each year, with more than 7 million deaths globally, making it the number one cause of preventable death in the world.
A recent study from Indian Journal of Medical and Paediatric Oncology summarizes the many harmful effects of nicotine.

Nicotine’s Known Health Hazards

Short-term Dangers of Nicotine

  • Using nicotine in any form increases your blood pressure and heart rate and causes endothelial dysfunction, which can cause a heart attack and a stroke.
  • Smoking nicotine products also exposes your lungs to a variety of hazardous chemicals.
  • Vaping nicotine exposes your lungs to acetate fillers and metallic vapors from the heating coils.
  • There is a risk of lethal poisoning, with only 10mg for a young toddler and 50mg for an adult.

Long-term Risks of Nicotine

  • Cancer (particularly lung cancer when smoked and oral cancers when chewed, snorted, or dipped).
  • Cardiovascular illnesses, including heart disease, high blood pressure, and stroke.
  • Respiratory illnesses, such as chronic bronchitis, emphysema, COPD, and pneumonia.
  • Promotion of other serious diseases such as leukemia, cataracts, and even Type 2 diabetes.
  • Complications in pregnancy, including miscarriage, premature and stillbirth delivery, low birth weight, and SIDS.
  • Problems in the development of the brain circuits that control attention and learning in adolescents and teens.
  • Nicotine can cause sexual dysfunction and erectile dysfunction.

Withdrawal Symptoms

  • Irritability
  • Trouble sleeping and insomnia
  • Depression
  • Increased appetite
  • Powerful cravings to consume nicotine

Questionable Practices

We now know that the tobacco companies hid evidence, lied to authorities, and fooled the public into believing cigarettes and nicotine were safe. Countless deaths can be attributed to their inaction and outright misinformation about the dangers of their products.

Not only did they know nicotine was addictive and that smoking tobacco carried substantial health risks, but the companies spent a lot of money on studies, experts, and lobbyists to support their case, and donated millions in political contributions seeking cover from government regulators. 

During this time when they were trying to conceal the dangers they knew about, the tobacco companies actually worked to make their products even more addictive to users…

  • Ammonia was added so that nicotine travels to the brain faster.
  • The nicotine content in tobacco products doubled.
  • The cigarette design was modified to increase nicotine delivery to smokers.
  • Sugars, flavors, and menthol were added to dull the harshness of the smoke and make it easier to inhale. 

Despite the advances made both in uncovering the truth about nicotine and in regulating the tobacco industry, the companies continue trying to get around the laws by exploiting loopholes and new technologies. The newest nicotine danger comes from electronic cigarettes, also known as e-cigarettes, vaporizers, or vape-pens—battery-powered devices that do not contain tobacco, but deliver nicotine with flavorings and other chemicals to the lungs in vapor form instead of smoke.

The manufacturers of these nicotine products are actively marketing them to young customers today, and often advertise them as safer than traditional cigarettes because they don't burn tobacco. In fact, researchers know little about the health risks of using these devices.

The manufacturers of these nicotine products are actively marketing them to young customers today, and often advertise them as safer than traditional cigarettes because they don't burn tobacco. In fact, researchers know little about the health risks of using these devices.

A graph showing the decline in the percentage of high school students who use cigarettes and and increase in the percent that use e-cigarettes

All major tobacco companies own a vaping company. The tobacco companies are intentionally trying to perpetuate the addiction to nicotine by transitioning from tobacco to vaping.

Get Help Today to End a Dependence on Nicotine

Be sure to ask your doctor about the various options to quit, including counseling and support groups, and safe, affordable medications such as Varenicline.

Are you aware of nicotine’s danger to your heart?

Have you had a heart attack or other cardiovascular disease from using nicotine products?

Are you concerned about a friend or family member’s use of nicotine products and want to encourage them to quit?