A company that makes, distributes and promotes products that can purportedly enhance the growth of eyelashes and eyebrows has been targeted by a Food and Drug Administration (FDA) warning letter. According to the April 18, 2011, letter, the company claims that its products lengthen and thicken eyelashes, and renew and regenerate skin cells to grow new eyebrows. FDA contends that because these products contain a synthetic prostaglandin, they are drugs under federal law. They are also “new drugs,” “because they are not generally recognized as safe and effective under the conditions prescribed, recommended, or suggested in its labeling,” and thus require pre-approval before marketing and sale. FDA also notes that prostaglandins can have significant side effects that require the direction and supervision of a “licensed practitioner.” Without “adequate directions for use,” according to FDA, the products are also misbranded. If the company fails to correct the violations cited, FDA advises that product seizure and an injunction could ensue without further notice.