how tobacco affects your lungs Health Effects of Smoking on Body Lung Health: How Your Lungs
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"Senate August 29, 1957" (PDF)

Lynch, B.S., and Bonnie, R.J., eds

Monitoring for Mood Changes: Gabapentin has been linked to increased risks of depression, suicidal thoughts, and mood swings, especially in individuals with preexisting mental health conditions

Retrieved October 3, 2013

The decrease in two forms of MAO, A and B, then results in higher dopamine levels and may be another reason that smokers continue to smoke - to sustain the high dopamine levels that result in the desire for repeated drug use