References

Drug Facts and Comparisons.  St. Louis:  Wolters Kluwer Health, Inc., 2005.

Handbook of Nonprescription Drugs - APhA.  Washington, DC:  American Pharmacists Association, 2004.           

Physicians' Desk Reference For Nonprescription Drugs & Dietary Supplements.  Montvale:  Thomson PDR, 2005.

Website:  www.efactsonline.com.

Plus numerous primary literature resources.