The FTC handles most matters regarding claims in advertisements for OTC drugs. The Food and Drug Administration (FDA) handles most matters regarding the labeling of over-the-counter drugs. As with any other product claims for OTC drugs must be truthful and non-deceptive. Given the health and safety issues that can arise in marketing these products advertisers should take care in substantiating their claims. Depending on the claim advertisers may be required to back up their representations with competent and reliable scientific evidence including testing studies or other objective data. For more information about labeling OTC drugs see www.fda.gov or call the FDA Inquiry Line (800) 532-4440.~~