Nicotine salt (a form of natural nicotine) is sometimes combined with benzoic acid for vaping purposes

Your Drug Store and Cancer Center (02:25) Video of art installation by Alan Blum, MD at Buffalo Museum of Science, Fall 2009 Videographer: Paul Hage, MFA Project Director, Health Communications Resource Department of Health Behavior Roswell Park Cancer Institute Buffalo, New York We sell only FDA-approved tobacco products: one-stop shopping for all your prescription, cigarette, and chemotherapy needs (02:28) Video by Heather Hoffman, MD at the National Conference on Tobacco or Health, Phoenix, Arizona August 2009 Chronological Bibliography The Sale of Cigarettes and Other Tobacco Products in Pharmacies Articles in peer-reviewed pharmacy journals Newspaper and magazine articles Articles in peer-reviewed medical and public health journals Pharmacy trade publications Marketing and trade publications Generated by Nelle Williams, MSLS, Library Director, Health Sciences Library, College of Community Health Sciences, University of Alabama Assisted by Sharon Glenn, Senior Library Assistant, Health Sciences Library, College of Community Health Sciences, University of Alabama Edited by Alan Blum, MD, Director, University of Alabama Center for the Study of Tobacco and Society Updated by Ashley Weems, Student Pharmacist, Auburn University, James I

A single filter contained around 10 mg of crocidolite, meaning a person smoking a pack of Kent cigarettes would inhale more than 131 million crocidolite structures longer than 5 microns a year
You can also use a filter if you prefer