Peter L. Jacobsen, PhD, DDS, is an adjunct professor and the former director of the Oral Medicine Clinic at the University of the Pacific, Arthur A. Dugoni School of Dentistry in San Francisco. A nationally recognized speaker on dental pharmacology, over-the-counter dental products, longevity, and healthy lifestyle, Jacobsen is also the author of the Little Dental Drug Booklet, a handbook of commonly used dental medications.