The worst part is the carcinogenic chemical soup they add to cigarettes is to make it more palatable to smoke several times a day. Self-medicating is big business.
https://en.wikipedia.org/wiki/List_of_additives_in_cigarette...
The short answer is, "yes."
> This is the list of 599 additives in tobacco cigarettes submitted to the United States Department of Health and Human Services in April 1994.