I tried the following on Google:
"genetic mutations caused by drugs"
"drug associated genetic mutations"
"drug induced genetic mutations"
The only result was The Wall Street Journal's War on Cancer, and Google picks up professional articles. You might find this article interesting, but no mention of drug associated genetic mutations, or similar phenomena, was made.
Thanks for the articles.
I forgot, yahoo.com is supposed to have an even better search engine than google. Is air pollution considered to be a drug?
http://www.genomenewsnetwork.org/articles/2004/05/13/airpollution.php
http://www.hhmi.org/genetictrail/g110.html