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Nicotine (not cigarettes) shows promise for depression, anxiety, tics, and memory impairment.

Trials found significant improvement in response and remission rates in depression with nicotine patches.

Nicotine's effects on anxiety are dose-dependent, with low doses reducing and high doses worsening anxiety.

Studies on Alzheimer's, Down syndrome, HIV, and Parkinson's are small but promising.

Nicotine has a bad reputation. This reputation comes from its association with cigarettes, and the fact that millions of people die every year from the adverse health effects of smoking cigarettes. But cigarettes have been adulterated to be more addictive, and nicotine itself, when separated from cigarettes, is a different story.

Nicotine is a small molecule that fits into brain receptors called “nicotinic receptors.” These receptors are involved in attention, memory, and mood. Because of this, scientists have spent decades testing nicotine patches, gum, and lozenges as possible treatments for brain-related diseases. Although these results are mixed, they provide hope that nicotine may one day be a safe and effective medicine.

Also, nicotine-containing products are FDA-approved medicines for smoking cessation. A patch, gum, and lozenge are available without a prescription whereas a spray and inhaler do require a prescription.

I previously wrote a PT blog about the potential health benefits of nicotine. But after a reader provided me with additional information, I decided to take a deeper look. And here’s what I found.

Nicotine and Depression

Multiple small studies have shown improvement in depression following treatment with nicotine patches. For example, in a 2018 trial, 15 older adults........

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