Yes, smoking is significantly more common among people with mental health conditions. Adults with any mental illness smoke at a rate of about 22.8%, compared to 13.6% for those without a mental health condition. That makes smoking roughly 67% more prevalent in this group. For certain diagnoses, the gap is even wider.
How Big Is the Gap?
The overall U.S. adult smoking rate was about 11.6% in 2022. People with mental health conditions smoke at nearly double that rate, and the more severe the condition, the higher the numbers climb. Adults with serious mental illness smoke at 27.2%. Those experiencing serious psychological distress smoke at around 28.1%. Even milder conditions carry elevated rates: 21.2% for mild or moderate mental illness and 17.6% for major depressive disorder alone.
One striking statistic puts the disparity in perspective. People with a mental health condition in the past month consume roughly 44% of all cigarettes smoked in the U.S., despite making up a much smaller share of the population. This concentration of tobacco use in one demographic has major public health consequences.
Rates Vary Widely by Diagnosis
Schizophrenia stands out dramatically. Estimates suggest 70 to 85% of people with schizophrenia smoke, making it one of the highest smoking rates of any identifiable group. Bipolar disorder follows closely, with 50 to 70% of affected individuals smoking. Major depression sits lower but still well above the general population: about 24.2% of adults with a past-year depressive episode smoke, compared to 17.6% of those without one.
These aren’t small differences. A person with schizophrenia is five to seven times more likely to smoke than the average American adult. Even at the lower end, someone with depression is still meaningfully more likely to be a smoker than someone without it.
Why Nicotine Appeals to People With Mental Illness
The connection between mental illness and smoking isn’t random. Nicotine reaches the brain within 10 to 20 seconds of a puff, where it activates the same receptor sites used by acetylcholine, a chemical messenger involved in attention, memory, and mood regulation. This rapid delivery is part of what makes cigarettes so addictive for anyone, but the effects may be especially reinforcing for people whose brain chemistry is already disrupted.
For people with schizophrenia, smoking appears to improve specific cognitive functions that the illness impairs. Studies show that smokers with schizophrenia perform better on tasks involving information processing and sustained attention than healthy smokers do on similar tasks. In other words, the cognitive boost from nicotine seems to be larger for people who start with deficits. This has led to what researchers call the “self-medication hypothesis,” the idea that people with mental illness smoke partly because nicotine temporarily relieves some of their symptoms.
Depression involves a similar dynamic. Nicotine triggers the release of mood-regulating brain chemicals, providing a brief lift that someone with chronic low mood may find particularly rewarding. The temporary relief reinforces the habit, making the cycle harder to break.
Smoking Interferes With Psychiatric Medications
Beyond the usual health risks of smoking, there’s a less obvious problem for people taking psychiatric medications. Chemicals in tobacco smoke speed up the liver enzymes that break down several common antipsychotic drugs, lowering the amount of medication that actually reaches the bloodstream. This means smokers may need higher doses to get the same therapeutic effect.
The flip side is equally important. If someone on these medications quits smoking, their drug levels can rise unexpectedly, sometimes to the point of causing side effects. This requires careful monitoring and dose adjustments during any quit attempt, which adds another layer of complexity to an already difficult process.
The Life Expectancy Cost
People with serious mental illness already face a shortened life expectancy, and smoking accounts for a significant chunk of that gap. A study of people with schizophrenia, schizoaffective disorder, and bipolar disorder found that women who smoked lived an average of 7.3 fewer years than nonsmokers with the same diagnoses. For men, the gap was 5.0 years. These are years lost not to the mental illness itself but to the cardiovascular disease, lung cancer, and respiratory conditions that smoking causes.
Quitting Is Harder, and Support Has Lagged
Between 2004 and 2011, smoking rates among adults without mental illness dropped from 19.2% to 16.5%, a statistically significant decline. During the same period, rates among those with mental illness barely budged, going from 25.3% to 24.9%. The gap between the two groups actually widened over time.
Several factors explain why quitting is harder for this population. Nicotine withdrawal can temporarily worsen anxiety, depression, and concentration problems, which are already core features of many mental health conditions. People in psychiatric treatment settings have historically been allowed or even encouraged to smoke, with cigarettes sometimes used as rewards in institutional settings. And until relatively recently, many mental health providers didn’t prioritize smoking cessation, either assuming their patients couldn’t quit or worrying that the stress of quitting would destabilize their mental health.
That assumption turns out to be largely wrong. Evidence consistently shows that quitting smoking does not worsen mental health outcomes and, in many cases, improves mood and anxiety over time. But the perception persists, and it has slowed the integration of tobacco treatment into mental health care. The result is a population that smokes more, has a harder time stopping, and receives less help doing so.