However, when smoking is combined with drinking alcohol, it appears to make the DNA damage from alcohol much worse, increasing the harm by about 2.5 times compared to alcohol alone.

Alcohol and Tobacco Content in UK Video Games and Their Association with Alcohol and Tobacco Use Among Young People. Cyberpsychology, Behavior, and Social Networking, 2016; 19 (7): 426 DOI: 10. ...

American Chemical Society. "Smoking and alcohol: Double trouble for the brain?." ScienceDaily. ScienceDaily, 27 February 2019. <www.sciencedaily.com / releases / 2019 / 02 / 190227140020.htm>.