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tobacco

This shows two teens surrounded by clouds of smoke.

·June 4, 2026·9 min read

Cannabis & Tobacco Co-Use Lower Cognitive Scores in Teens

Among youth at clinical high risk for psychosis, cannabis and tobacco co-use is associated with significantly lower cognitive performance compared to healthy controls.

This shows a fuzzy head and a cigarette.

Featured Neuroscience Psychology

·May 17, 2026·9 min read

Combining Cannabis and Tobacco Triples Psychosis Risk

Does combining cannabis and tobacco accelerate the onset of schizophrenia? A multi-site study reveals that the co-use of cannabis and tobacco triggers a nearly threefold increased risk of developing psychotic disorders in individuals already at clinical high risk.

This shows the outline of two heads and brains.

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·October 21, 2025·5 min read

Tobacco and Cannabis Together Alter Brain’s “Bliss Molecule” System

People who use both cannabis and tobacco show unique brain chemistry linked to higher anxiety, depression, and difficulty quitting. Brain scans revealed increased levels of FAAH, an enzyme that breaks down the brain’s “bliss molecule,” anandamide.

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·September 13, 2023·4 min read

Tobacco and Cannabis Combo Ups Anxiety and Depression Risk

A new study indicates a link between the co-use of tobacco and cannabis and heightened rates of anxiety and depression. Analyzing data from the COVID-19 Citizens Health Study, researchers delved into the substance use habits of 53,843 US adults between 2020 and 2022.

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·April 29, 2020·2 min read

Tobacco smoking increases lung entry points for COVID-19

Smoking remodels the gene expression of lung cells so that the ACE2 gene is more highly expressed in goblet cells. The effects of smoking on ACE2 pulmonary expression indicates an increase in the overall entry points for coronavirus and increases the risk for viral binding and entry of COVID-19 into the lungs.

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·November 6, 2019·3 min read

Tobacco smoking increases risk of depression and schizophrenia

The link between smoking, depression, and schizophrenia is due, in part, to a causal effect of tobacco use. Findings reveal that smoking increased the risk of schizophrenia and depression. Additionally, depression and schizophrenia increased the likelihood of a person becoming nicotine dependent.

Featured Neuroscience Psychology

·July 17, 2019·1 min read

Legalized recreational marijuana a substitute for alcohol, but not tobacco

Legalized recreational marijuana may spell bad news for the alcohol industry, but not tobacco. A new study reports in states where the recreational use of marijuana is legal, internet searchers for alcohol-related products dropped by 11%, but tobacco-related searchers increased by 8%.

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·June 25, 2019·2 min read

Smokers may have impaired neuroimmune function

Smokers may have reduced neuroimmune function compared to their non-smoking peers. Researchers report restoring the immune system may benefit smokers. Immune dysfunction is linked to cognitive dysfunction.

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·June 21, 2019·4 min read

A new drug target for chemically induced Parkinson’s disease

Mitochondrial CYP2D6 may be a powerful target for the treatment of Parkinson's disease induced by MPTP.

This shows a young person surrounded by smoke

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·June 5, 2019·2 min read

Tobacco increases risk of schizophrenia and psychosis

Meta-analysis finds a two-fold increased risk of developing schizophrenia and psychosis amongst those who smoke tobacco. Researchers speculate nicotine is most likely responsible for the link. They suggest future research looks at the link between e-cigarettes and a possible increased risk of psychosis in young adults, the largest consumer group for the products.

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·January 25, 2019·4 min read

Tobacco Use in Adolescence Tied to Paranoia, Due Largely to Shared Genetic Influences

Researchers have discovered a link between teenage tobacco use and an increased risk of psychotic experiences, such as paranoia and hallucinations. They report this may be due, in part, to some shared genetic influences.